Antoine started in business as a sole trader on 1 April 20X7. He buys broken clocks, repairs them in his workshop and resells them. He has incurred the following costs for April 20X7: $ Materials 62,025 Shipping inwards 9,823 Selling expenses 6,213 Import duty 2,615 Labour 38,092 Postage and packing to customers 986 Workshop rent 16,500 The labour and workshop rent costs were incurred solely on the repair of clocks. All of the clocks have been sold during the month and there is no inventory or work in progress at the end of April. What is Antoine's cost of sales for the month ended 30 April 20X7