During the year, trc corporation has the following inventory transactions. date transaction number of units unit cost total cost jan. 1 beginning inventory 60 $ 52 $ 3,120 apr. 7 purchase 140 54 7,560 jul. 16 purchase 210 57 11,970 oct. 6 purchase 120 58 6,960 530 $ 29,610 for the entire year, the company sells 450 units of inventory for $70 each. 3. using weighted-average cost, calculate ending inventory, cost of goods sold, sales revenue, and gross profit.