Schrute Farm Sales buys portable generators for $ 480 and sells them for $ 770. He pays a sales commission of​ 5% of sales revenue to his sales staff. Mr. Schrute pays $ 7 comma 000 a month rent for his​ store, and also pays $ 1 comma 700 a month to his staff in addition to the commissions. Mr. Schrute sold 300 generators in June. If Mr. Schrute prepares a contribution margin income statement for the month of​ June, what would be his contribution​ margin?