E6-4 During the year, IRC Corporation has the following inventory transactions. Date Transacton Apr. 7 Jul 16 Oct. 6 scoinning InVChIOsy Purchase Purchase Purchase For the entire vear. the company sells 450 units of inventor for $70 each Required: 1. Using FIFO, calculate (a) ending inventory, (b) cost of goods sold, (c) sales revenue, and (d) gross profit. 2. Using LIFO, calculate (a) ending inventory, (b) cost of goods sold, (c) sales revenue, and (d) gross profit. 3. Using weighted-average cost, calculate (a) ending inventory, (b) cost of goods sold, (c) sales revenue, and (d) gross profit. 4 Determine which method will cecult in bicher nrotobilite they investors costs ore ricing