The department may reject any or all bids. It shall determine which of the acceptable bids made by responsible bidders will provide for erection and rental of the housing units in accordance with the terms of the department's request for bids at the lowest cost to the Commonwealth and shall notify the successful bidder which may be the sole bidder and shall, on behalf of the Commonwealth, after ratification by the Governor as provided in section ten of this act, enter into a contract with the successful bidder.
35 P.S. § 1669