1. ENGAGEMENT AND ACCEPTANCE MPTN hereby engages the Contractor, and the Contractor agrees to provide all labor, materials, equipment, and supervision for a Project as set forth in Attachment A (the “Work”) to a PO which shall be issued by MPTN and which shall make specific reference to this Agreement. The Work shall be performed in coordination with MPTN. 2. AGREEMENT TIME The Work to be performed pursuant to this Agreement shall be completed pursuant to the time as set forth in the PO (“Contact Time”). Time is of the essence. 3. AGREEMENT SUM. For the completion of the Work by Contractor under this Agreement, MPTN agrees to pay Contractor the amount as set forth on the PO (“Contract Sum”). 4. PAYMENT TERMS 4.1 Progress payments shall be made based on percentage of Work completed, subject to review and approval by the Authorized MPTN Representative (“AR”). The AR shall be named on the PO. Pay Applications on the approved MPTN form setting forth the statement of work completed shall be submitted to the AR for review and approval on a monthly basis. The Contractor shall, at its own expense, promptly correct Work rejected as provided herein. In the event that Contractor disputes the determination of the AR then such dispute shall be subject to mediation as provided herein. Payment of invoices shall be due within thirty (30) days of approval by the AR. Pending final resolution of an invoice, claim, or other dispute, the Contractor shall proceed diligently with performance of the Work and the MPTN shall continue to make payments in accordance with this Agreement. 4.2 If, at any time, Contractor believes that MPTN’s actions result in additional cost or time not otherwise set forth in the Contract, Contractor must provide written notice within two (2) days of the event giving rise to the claim describing the basis for the claim and Contractor’s best current, reasonable cost estimate. Contractor acknowledges that