Can you please explain why my answer is incorrect?

Required information [The following information applies to the questions displayed below.] Altira Corporation provides the following information related to its merchandise inventory during the month of August 2021 Required: 1. Using calculations based on a perpetual inventory system, determine the inventory balance Altira would report in its August 31 , 2021, balance sheet and the cost of goods sold it would report in its August 2021 income statement using the FIFO method