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 $37 each, Purchases on December 710 units \& $23.00 cost Purchases on December 1420 units \& $29.00 cost Purehases on December 2115 units $31.00 cost 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.)