Tenant Improvement Allowance. Subject to any restrictions, conditions or limitations expressly set forth in this Tenant Work Letter or in the Lease or as otherwise expressly provided by mutual written agreement of Landlord and Tenant, the cost of construction of the Tenant Improvements shall be paid or reimbursed by Landlord up to a maximum amount as set forth in Section 5 of the Summary to the Lease (the "Tenant Improvement Allowance"), which amount is being made available by Landlord to be applied towards the Cost of Improvements for the construction of the Tenant Improvements in the Premises. Tenant shall be responsible, at its sole cost and expense, for payment of the entire Cost of Improvements of the Tenant Improvements in excess of the Tenant Improvement Allowance, including (but not limited to) any costs or cost increases incurred as a result of delays (unless caused by Landlord), governmental requirements or unanticipated conditions (unless caused by Landlord), and for payment of any and all costs and expenses relating to any alterations, additions, improvements, furniture, furnishings, equipment, fixtures and personal property items which are not eligible for application of Tenant Improvement Allowance funds under the restrictions expressly set forth below in this paragraph, but Tenant shall be entitled to use or apply the entire Tenant Improvement Allowance toward the Cost of Improvements of the Tenant Improvements (subject to any applicable restrictions, conditions, limitations, reductions or charges set forth in the Lease or in this Tenant Work Letter) prior to being required to expend any of Tenant’s own funds for the Tenant Improvements. The funding of the Tenant Improvement Allowance shall be made on a monthly basis or at other convenient intervals mutually approved by Landlord and Tenant and in all other respects shall be based on such commercially reasonable disbursement conditions and procedures as Landlord, Project Manager and Landlord’s lender (if any) may reasonably prescribe. Notwithstanding the foregoing provisions, under no circumstances shall the Tenant Improvement Allowance or any portion thereof be used or useable by Tenant for any moving or relocation expenses of Tenant, or for any Cost of Improvement (or any other cost or expense) associated with any moveable furniture or trade fixtures, personal property or any other item or element which, under the applicable provisions of the Lease, will not become Landlord’s property and remain with the Building upon expiration or termination of the Lease, and except as otherwise expressly provided in this Tenant Work Letter or expressly approved by Landlord in writing, any portion of the Tenant Improvement Allowance which has not been claimed or drawn by Tenant prior to the later to occur of # the date that is 18 months after the Lease Commencement Date, and # the date of receipt of the Substantial Completion Certificate, shall expire and shall no longer be available to Tenant thereafter. Notwithstanding anything to the contrary herein, the Tenant Improvements shall not include (and Landlord shall be solely responsible for and the Tenant Improvement Allowance shall not be used for) the following: # costs incurred due to the presence of any Hazardous Materials in the Premises, if any; # costs to bring the Project into compliance with Applicable Laws to the extent required in order to allow Tenant to obtain a certificate of occupancy or its [[Organization A:Organization]] equivalent, for the Premises for the Permitted Use assuming a normal and customary office occupancy density;

Additional TI Allowance. Pursuant to the terms of Section 4 of the Tenant Work Letter attached to the Lease as Exhibit B, Tenant was entitled to an Additional TI Allowance of up to $ (the "Additional TI Allowance"). Notwithstanding any provision to the contrary contained in the Lease, Landlord and Tenant hereby acknowledge and agree that Tenant has utilized and /100 Dollars ($ . ) of the Additional TI Allowance (the "Utilized Additional TI Allowance").

Leasing commissions associated with this Lease, including the commissions payable to the Brokers;

Space Plan Allowance. Upon providing to [[Organization A:Organization]], a paid invoice showing the costs incurred by [[Organization B:Organization]], [[Organization A:Organization]] shall reimburse [[Organization B:Organization]] for its space planning costs in an amount not to exceed $0.12 per rentable square foot in the Premises.

Space Planning Allowance. In addition to the ES Allowance, and as a further inducement to Tenant’s entering into this Fourth Amendment, Landlord shall, subject to this [Section 5], provide to Tenant a special tenant improvement allowance equal to Nine Hundred Sixteen and 56/100 Dollars ($916.56) (the “Space Planning Allowance”) to be used by Tenant solely for design and architectural costs incurred by Tenant for space planning the Expansion Space. Provided there is no Event of Default or event which, with the passage of time and/or the giving of notice would constitute an Event of Default, Landlord shall pay the Space Planning Allowance to Tenant within thirty (30) days after the later to occur of # Landlord’s receipt of the draft ES Design/Development Plans, and # Landlord’s receipt of a reasonably detailed invoice therefor, which invoice must be delivered to Landlord on or before the date which is sixty (60) days after the ES Commencement Date; provided, however, that if Tenant cures any default prior to the expiration of applicable cure periods set forth in [Article 20] of the Lease, then Landlord’s obligation to pay the Space Planning Allowance shall be reinstated. Tenant shall not be entitled to any unused portion of the Space Planning Allowance.

Space Plan Allowance. Landlord agrees to reimburse Tenant for architectural costs incurred in connection with preparation of the Space Plan and two (2) revisions thereof in an amount not to exceed (the “Space Plan Allowance”). Tenant may submit invoices to Landlord for payment of the Space Plan Allowance to reimburse Tenant or to pay Tenant’s Architect directly (if so requested by Tenant) for the Space Plan prepared by Tenant’s Architect. Following Landlord’s receipt of such invoices, Landlord shall within thirty (30) days thereafter pay Tenant for the amount requested in such invoice; provided in no event shall Landlord be obligated to make disbursements for the Space Plan in an amount which exceeds the Space Plan Allowance. The Space Plan Allowance shall not be deducted from the Tenant Improvement Allowance.

Permitted Allowance Items. The Tenant Improvement Allowance shall be disbursed by Landlord only for the payment or reimbursement of the following items and costs (collectively, the “Permitted Allowance Items”): # costs of preparing the Space Plan, the Preliminary Plans, and the Approved TI Construction Drawings, # the cost of obtaining Permits, # the documented cost of performing the Tenant Improvement Work, including the cost of procuring, constructing and installing all construction materials, # the cost of any change to the Base Building Improvements required by the Approved TI Construction Drawings, including all direct architectural and/or engineering fees and expenses incurred in connection therewith, and # the costs and fees related to the management and supervision of the Tenant Improvement Work for Tenant’s benefit. From time to time during the course of construction, Landlord may charge against the Tenant Improvement Allowance any and all Permitted Allowance Items incurred by Landlord, including, without limitation, any increased costs incurred by Landlord as a result of, or in connection with, Plan Modifications or any Tenant Delay. Permitted Allowance Items shall not include furnishings, fixtures, equipment and other personal property, including cabling, switches, servers, routers and similar data and telecommunications equipment costs.

Landlord’s Allowance. Landlord shall contribute toward the cost of the design, construction and installation of the Tenant Improvements (including, without limitation, the fee for Contractor and Landlord’s Costs (as defined in Paragraph 5.c.iii. below)) to be constructed in the Premises an amount not to exceed One Million Six Hundred Forty-Four Thousand Six Hundred Sixty Dollars ($1,644,660) (“Landlord’s Allowance”); provided, however that not more than One Hundred Eighty-Four Thousand Five Hundred Seventy-Eight Dollars ($184,578.00) of Landlord’s Allowance may be applied to Tenant’s reasonable architectural and engineering costs for the design of the Tenant Improvements for the Premises; and provided, further, that not more than Four Hundred Thirty-Five Thousand Five Hundred Twenty-Eight Dollars ($435,528.00) of Landlord’s Allowance may applied to the costs of work stations, carpeting, wall coverings, and data/telecommunications cabling/wiring for the Premises. No portion of Landlord’s Allowance may # be applied to the cost of any other equipment or furniture, or trade fixtures, moving expenses, or signage # be applied to any portion of the Premises which is then the subject of a sublease, or # be used to prepare any portion of the Premises for a proposed subtenant or assignee. Notwithstanding anything to the contrary in this Paragraph 5.c.i., but subject to Paragraph 5.c.ii., below, Landlord’s Allowance shall be available for disbursement pursuant to the terms hereof only until May 31, 2007 (the “Forfeit Date”). Accordingly, if any portion of Landlord’s Allowance has not been utilized (and Tenant has not submitted to Landlord invoices evidencing such costs) on or before the Forfeit Date, then, subject to Paragraph 5.c.ii., below, such unused portion shall be forfeited by Tenant. If Tenant elects to purchase work stations using the proceeds of the Landlord’s Allowance, then # Landlord shall have the option of requiring Tenant, upon (the expiration or earlier termination of the Lease, to transfer title of the work stations to Landlord and to leave the work stations at the Premises, # Tenant shall maintain insurance on such work stations for the full replacement value thereof, # Tenant shall keep and maintain the work stations in good working order, condition and repair, and # Tenant shall not allow any lien or other security interest to attach to or be placed upon such work stations at any time during the term of this Lease, and, in that regard, Tenant shall not offer the work stations as collateral for any loan or other financing Tenant may obtain.

Landlord’s Allowance. For purposes of this Paragraph 3, the Third Floor Additional Premises and the Fourteenth Floor Additional Premises are sometimes referred to collectively as the “Additional Premises” and the Third Floor Alterations and the Fourteenth Floor Alterations are sometimes referred to collectively as the “Additional Premises Alterations.” Landlord shall contribute toward the cost of the design, construction and installation of the Additional Premises Alterations an amount not to exceed Thirty Six Thousand Dollars ($36.000.00) (“Landlord’s Allowance”). No portion of Landlord’s Allowance may # be applied to the cost of any other equipment or furniture, or trade fixtures, moving expenses, signage or free rent, # be applied to any portion of the Additional Premises which is then the subject of a sublease, or # be used to prepare any portion of the Additional Premises for a proposed subtenant or assignee. Notwithstanding anything to the contrary in this Paragraph 3, Landlord’s Allowance shall be available for disbursement pursuant to the terms hereof only until December 31, 2010 (the “Forfeit Date”). Accordingly, if any portion of Landlord’s Allowance has not been utilized (and Tenant has not submitted to Landlord invoices evidencing such costs) on or before the Forfeit Date, then such unused portion shall be forfeited by Tenant.

All equipment, notebooks, documents, memorandums, reports, files, auto records, samples,