In its first month of operations, Cullumber Company made three purchases of merchandise in the following sequence: (1) 100 units at $5, (2) 400 units at $ 6, and (3) 100 units at $7. Calculate the average unit cost. (Round answer to 2 decimal places, e.g. 15.25.) Average unit cost $ Compute the cost of the ending inventory under the average-cost method, assuming there are 250 units on hand. (Round answer to 0 decimal places, e.g. 1,250.) The cost of the ending inventory $