Preston Milled products currently sells a product with a variable cost per unit of $21.00 and a unit selling price of $39.00. At the present time, the firm only sells on a cash basis with monthly sales of 300 units. The monthly interest rate is 1.1 percent. What is the switch break-even point if the firm switched to a net 30 credit policy? Assume the selling price per unit and the variable costs per unit remain constant. 311 units 312 units 307 units 314 units 310 units