Frolic Corporation has budgeted sales and production over the next quarter as follows: Sales in units Production in units July August September 48,000 60,000 ? 48,400 60,300 64,650 The company has 5,600 units of product on hand at July 1. 10% of the next month's sales in units should be on hand at the end of each month. October sales are expected to be 79,500 units. Budgeted sales for September would be in units)