At May 1, 2015, Kibbee Company had beginning inventory consisting of 200 units with a unit cost of $7. During May, the company purchased inventory as follows: 800 units at $7 600 units at $8 The company sold 1,000 units during the month for $12 per unit. Kibbee uses the average cost method. The average cost per unit for May is O $7.000. $7.375. $7.500. $8.000