You are the in-charge auditor for the Nelson Company engagement for the year ending December 31, 2020. Nelson is a wholesale supplier of building materials and markets its products to several major retail chains. After evaluating the company's internal controls, you decide that the prescribed controls are not adequate, and assess control risk at the maximum level. Accordingly, you will rely entirely on substantive tests to verify the accounts receivable and revenue balances.

Required:Prepare an audit program that details the specific substantive tests you would apply to Nelson's accounts receivable and revenue for the December 31, 2020 audit engagement.