An auditor’s working papers include the narrative description below of the cash receipts and billing portions of internal control of Rural Building Supplies, Inc. Rural is a single-store retailer that sells a variety of tools, garden supplies, lumber, small appliances, and electrical fixtures to the public, although about half of Rural’s sales are to construction contractors on account. Rural employs 12 salaried sales associates, a credit manager, three full-time clerical workers, and several part-time cash register clerks and assistant bookkeepers. [...]