Trey Monson starts a merchandising business on December 1 and enters into the following three inventory Monson uses a perpetual inventory system. Also, on December 15 , Monson sells 15 units for $39 each. Purchases on December 710 units \& $25.00 cost Purchases on December 1420 units \& $31.00 cost Purchases on December 2115 units \& $33.00 cost QS 5-11 (Algo) Perpetual: Assigning costs with FIFO LO P1 Required: Determine the costs assigned to the December 31 ending inventory based on the FIFO method