Jin-Ming‘s mail order business sells trampolines. The selling price is £400 for a Pe standard size trampoline and £550 for a large one. The opening stock at 1 January 20X3 is 6 standard trampolines and 5 large. The cost of the trampolines to Jin-Ming is £260 (standard) and £330 (large). In the year to 31 December 20X3 Jin-Ming sells 30 standard and 17 large trampolines. He could have sold more of the large size but the manufacturer stopped making them part-way through the year. Jin-Ming’s purchases for the year totalled £14 880 including the purchase of 12 large trampolines.

a) Draw up Jin-Ming’s trading account for the year ending 31 December 20X3.

b) Calculate the gross profit on the sale of large and standard trampolines respectively.