(c) When a request is received concerning an unclassified invitation from an inquirer who is neither a bidder nor a representative of a bidder, the contracting officer should make every effort to furnish the names of successful bidders and, if requested, the prices at which awards were made. However, when such requests require so much work as to interfere with the normal operations of the contracting office, the inquirer will be advised where a copy of the abstract of offers may be seen.