In its first month of operations, Blossom Company made three purchases of merchandise in the following sequence: (1) 350 units at $5, (2) 400 units at $7, and (3) 500 units at $8. Blossom uses a periodic inventory system. (a1) Calculate weighted-average unit cost. (Round answer to 3 decimal places, e.g. 5.125.) Weighted-average unit cost $ eTextbook and Media Attempts: 0 of 2 used (a2) The parts of this question must be completed in order. This part will be available when you complete the part above