Joe's Mart policy is to have 20% of the next month's sales on hand at the end of the current month. Projected sales for August, September, and October are 33,000 units, 28,000 units, and 38,000 units, respectively. How many units must be purchased in September? Multiple Choice 22,400. O 23,400. 30,000. O O 35,600. 37,600 O