Required information Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases Also, on December 15, Monson sells 10 units for $50 each Purchases on December 7 Purchases on December 14 Purchases on December 21 8 units 17. units 15 units $28.00 COSE $30.00 cost $36.00 cost Required: Monson uses a perpetual inventory system. Determine the costs assigned to the December 31 ending inventory based on the FIFO method Perpetual FEO: Goods Purchased Inventory Balance Cost of Goods Sold of Units Cost Per Cost of Goods Unit Sold Date of Units Cost Per Unit Goods Purchased of Units Cost Per Unit Inventory Balance December 7 December December