Concept:Purchases are calculated from the creditors (accounts payable) control account.Explanation:Creditors account relationship:Opening creditors + Purchases − Cash paid to creditors − Returns outwards = Closing creditors.Rearrange to make Purchases the subject:Purchases = Closing creditors + Cash paid to creditors + Returns outwards − Opening creditors.Substitute the given values:Closing creditors = $2,285Cash paid to creditors = $32,170Goods returned to suppliers = $500Opening creditors = $2,495Therefore:Purchases = $2,285+$32,170+$500−$2,495Purchases = $32,460Answer:$32,460 (Option C)