REQUIRED For each of the following test objectives, identify the frame and sampling unit for performing tests of transactions. Base your responses on the flowcharts for the Sales/Receivables and Purchases/Payables systems that are in the Course Materials folder. Manual revenue cycle Test Objective Population Frame Sampling Unit Supporting Document[s] Shipments are billed Shipments Sales have been properly priced Sales Manual purchases cycle Test Objective Population Frame Sampling Unit Supporting Document[s] Purchases are properly authorized Purchases Vouchers payable are recorded timely Vouchers payable