Hamilton Wholesale Inc. had the following inventory transactions for one month. The company uses a perpetual system and FIFO. All purchases and sales are on account. # of unit cost or items sale price March 1 Opening balance 30 $15 March 5 Purchase 25 $19 Purchase March 7 of March 5 -5 items returned March 10 Sale 40 $40 March 12 Purchase 20 $22 March 17 Sale 15 $50 March 24 Purchase 25 $24 Use an inventory cost chart and an accounting chart to analyze the above transactions, and then answer the questions below.