In its first month of operations, Sheridan Company made three purchases of merchandise in the following sequence: (1) 300 units at $7.(2) 450 units at $8, and (3) 250 units at $9. (a) Calculate the average unit cost. (Round answer to 2 decimal places, e.g. 15.25.) Average unit cost $ eTextbook and Media Save for Later Attempts: 0 of 5 used Submit Answer (b) Compute the cost of the ending inventory under the average-cost method, assuming there are 400 units on hand. (Round answer to O decimal places, e.g. 1,250.) The cost of the ending inventory $