Owner shall be liable for the costs and expenses of maintaining and operating the Project, and except as otherwise specifically provided in this Agreement, Owner shall pay for all reasonable costs and expenses incurred by Manager in connection with the maintenance or operation of the Project and the performance by Manager of its other duties under this Agreement, in each case to the extent the same are incurred in accordance with and subject to the limitations set forth in Sections 2.04 and 2.07 of this Agreement. Purchases of, or contracts for, materials or services may be made in bulk by Manager in connection with its operation of apartment projects generally, and Owner agrees that the pro rata portion of the net costs of such materials or service used in connection with, or for the benefit of, the Project shall be allowed as a cost payable by Owner hereunder. Owner shall not be obligated to pay Manager for any overhead expenses of Manager incurred with respect to its general offices, or for any salaries or other personnel costs including fringe benefits, and processing costs) of off-site supervisory personnel, Owner shall reimburse Manager for postage and office supplies used exclusively in the management of the Project. Manager shall not be obligated to make any advance to or for the account of Owner or to pay any sums except out of funds in the Operating Account. Manager will be excused from performance of its responsibilities under this Agreement to the extent that funds are not available in the Operating Account to pay related expenses (other than expenses for which Manager is not entitled to payment under the terms of this Agreement), provided that Owner does not provide funds after written, reasonably detailed request therefor by Manager.