Required information [The following information applies to the questions displayed below.] Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15 , Monson sells 15 units for $27 each. Required: Determine the costs assigned to the December 31 ending inventory based on the FIFO method. Required information [The following information applies to the questions displayed below.] Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15, Monson sells 15 units for $27 each. etermine the costs assigned to ending inventory when costs are assigned based on the LIFO method. Required information [The following information applies to the questions displayed below.] Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15 , Monson sells 15 units for $27 each. etermine the costs assigned to ending inventory when costs are assigned based on the weighted average method. (Round your per nit costs to 2 decimal places.) Required information [The following information applies to the questions displayed below.] Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15, Monson sells 15 units for \$27 each. f the units sold, 8 are from the December 7 purchase and 7 are from the December 14 purchase. Determine the costs assigned to ending inventory when costs are assigned based on specific identification