The BPA holder shall segregate costs associated with materials and other items authorized to be purchased on a cost-reimbursement basis. This Contract Purchase Agreement is sent for your review and acceptance.Notify the Buyer via email of any needed. A blanket purchase order is a convenient way for businesses to cut down invoice processing time and costs for their vendor relationships. Our blanket purchase agreements establish an agreement between a government buyer and a MAS contractor to fill repetitive needs for supplies or services. Ordering activities shall establish the BPA with the schedule contractor(s) that can provide the supply or service that represents the best value.