Find using FIFO and average cost botha) cost of goods soldb) ending inventory

Bridgeport-Mart Centre Inc. opened for business on May 1, and uses a perpetual inventory system. During May, the company had th following purchases and sales for one of its products: Purchases Sales Date Units Unit Cost Units Unit Price May 1 120 $100 80 $245 8. 100 110 13 80 269 15 116 20 60 294 40 319 27 60