Prompt traders, sultanate of Oman are the largest wholesale distributors of milk products to the hypermarkets in Oman. Most of the company's sales are on credit basis. The company has given average one- month credit period to the customers. Prompt traders are having very good policy to recover the trade debtors, almost 85% of the trade debtors have been recovered in every year. The following are the details of the trade debtors and credit sales for the past five year Year 2018 2017 2016 2015 2014 Trade debtors OMR 15,000 OMR 13,000 OMR 16,000 OMR 18,000 OMR 10,000 Credit sales OMR 50,000 OMR 65,000 OMR 45,000 OMR 60,000 OMR 40,000 Required: 1. While performing the final audit of Prompt traders, Sultanate of Oman, As an Auditor of the company what are the methods of audit procedure should follow to obtain the audit evidence of the trade debtors. 2. As per the ISA 500, Discuss the different types of sources to check the reliability of audit evidence for the trade debtors 3. Is audit sampling appropriate in the above mentioned items? Give reason for your