In its first month of operations, Kingbird, Inc. made three purchases of merchandise in the following sequence: (1) 800 units at $4, (2) 850 units at $6, and (3) 950 units at $7. (a) Calculate average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Average unit cost $ eTextbook and Media List of Accounts Save for Later Attempts: unlimited Submit Answer (b) The parts of this question must be completed in order. This part will be available when you complete the part above.