Calculate a) cost of goods sold, b) ending inventory, and c) gross margin for A76 Company, considering the following transactions under three different cost allocation methods and using perpetual inventory updating. Provide calculations for weighted average (AVG). Round "Unit Cost" answers to 2 decimal places and other answers to the nearest dollar amount. Number of Units Unit Cost Sales Beginning Inventory Sold 260 $100 160 $140 Purchased 500 103 Sold 400 142 Purchased 420 110 Sold 370 174 Ending Inventory 250 AVG (perpetual) Inventory Cost of Goods Purchased Cost of Goods Sold Cost of Inventory Remaining #units Unit Cost Total Cost #units Unit Cost Total Cost #units Unit Cost Total Cost Beginning $ Sale Purchase Sale Purchase Sale Total Purchases Total COGS Gross Margin, AVG perpetual Sales COGS Gross Margin