At May 1, 2012, Kibbee Company had beginning inventory consisting of 100 units with a unit cost of $7. During May, the company purchased inventory as follows: 400 units at $7 300 units at $8 The company sold 500 units during the month for $12 per unit.Kibbeeuses the average cost method. The average cost per unit for May is $7.375. $7.500. $8.000. $7.000