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 perpet Inventory updating. Provide calculations for first in first-out (FFO). Number of Units Sales Unit Cost $130 250 $170 Beginning Inventory Sold Purchased Sold Purchased Sold Ending Inventory 160 510 400 133 172 400 140 174 370 240 Cost of Goods Purchased FIFO (perpetual) Inventory Cost of Goods Sold Number of Units Unit Cost Number of Units Cost of Inventory Remaining Number of Units Unit Cost Total Cost Unit Cost Total Cost Total Cost Beginning Sale Purchase Sale I l II [] II 11 III III I III O Purchase Sale Total Purchases Total COGS Gross Margin, FIFO perpetual COGS Gross Mary