Zenith Trading Establishment imports Mobility Aids for distribution to the local retail sector. During the year, January to December 2020, the company incurred following expenses: List price of purchase of mobility aids Trade discounts on purchase Handling costs relating to imports Salaries of accounting department Sales commission paid to sales agents After sales warranty costs Import duties Freight expense Insurance of purchases Brokerage commission paid to indenting agents $250,000 5% $5,000 $72,000 $36,000 $5,000 $10,800 $12,000 $7,500 $5,000 Zenith Trading Establishment bought these items on 1 April 2020 on credit terms which the company eligible for a 2 % cash discount when the invoice was settled on 27 April 2020. Required: A. Calculate the total cost for purchases of the mobility aids. (4 marks) B. Explain the rationale for the treatment of each item of cost incurred. (6 marks)