Jamaliah receives an invoice for the purchase of 40 batteries for RM 8,440 on 31 March 2021. Trade discounts are 5 % and 3 % and the cash discount terms are 8/10, 5/30, n/60. She pays the invoice on 19 April 2021. She plans to sell the batteries by allowing 10 % of the cost for operating expenses and 28 % of the selling price for gross profit

. (a) Find the payment on 19 April 2021.

(b) Find the selling price and the net profit for each battery.

(c) After two months, Jamaliah manages to sell 30 batteries. The remaining 10 batteries are sold by allowing 10 % markdown. Calculate the total sales made by Jamaliah if all the batteries are sold.