On May 1, 2022, Ivanhoe Company had beginning inventory consisting of 258 units with a unit cost of $7. During May, the company purchased inventory as follows: 516 units at $7 774 units at $8 The company sold 1290 units during the month for $12 per unit. Ivanhoe uses the average-cost method. The average cost per unit for May is $8.00. O $9.00. $7.00 O $7.50