Concept:Cost of goods equals the total money handed to the storekeeper minus the change returned.Explanation:You gave a GH₵10.00 note.You also gave an extra 15Gp=GH₵0.15.So, total cash given =10.00+0.15=GH₵10.15.The storekeeper gave you back 50Gp=GH₵0.50.Therefore, cost of goods =10.15−0.50=GH₵9.65.Answer:C. GH₵9.65