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 $35 each. Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. Note: Round your per unit costs to 2 decimal places. 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 $35 each. Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. Note: Round your per unit costs to 2 decimal places