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 260 $140 Sold 160 $180 Purchased 500 143 Sold 400 182 Purchased 420 150 Sold 370 214 Ending Inventory 250 AVG (perpetual) Inventory Cost of Goods Purchased Cost of Goods Sold Cost of Inventory #units Unit Cost Total Cost #units Unit Cost Total Cost #units Unit Cost Beginning Sale Purchase Sale Purchase Sale Total Purchases Total COGS