Please Explain:

The Box Store has a beginning cash balance of $318 on March 1. Projected sales are $720 for February, $850 for March, and $980 for April. The cost of goods sold is equal to 57 percent of sales with goods being purchased one month prior to the month of sale. The accounts payable period is 45 days and the accounts receivable period is 20 days. The firm has monthly cash expenses of $274. What is the projected ending cash balance at the end of March? Assume every month has 30 days. Multiple Choice $342 $360 $407 $418 O O $372