Calculate a) cost of goods sold, b) ending inventory, and c) gross ma calculations for last-in, first-out (LIFO). Number of Units Unit Cost Sales Beginning inventory 260 $100 Sold 160 $140 Purchased 520 103 Sold 400 142 Purchased 410 110 Sold 370 174 Ending inventory 260 Cost of Goods Purchased Number of Units Unit Cost Total Cos Beginning Sale Purchase 520 103 53,5 Sale Purchase 410 110 45,14 Sale Total Purchases 98,66 Gross Margin, LIFO perpetual Check My Work