Alvin runs a music store but does not keep a kill set of accounting records. He marks up his goods by 50 percent All 4Ales are on a credit basis and all takings are banked at the end of the day. Alvin believes that some cash was stolen from the tit on 31 December 2014 when he was unable to get to the bank because it dosed early. He can provide the following details.

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Cash banked 165 100 Inventory at 1 January 2014 24 500 Inventory at 31 December 2014 23 100 Purchases 111 600 Trade receivables at 1 January 2014 23 200 Trade receivables at 31 December 2014 21 400