Stanley's Bicycles store buys bicycles on average for $610 and sells them on average for $800. He pays a sales commission of 15% of sales revenue to his sales staff. Stanley pays $1,500 a month rent for his store, and also pays $3,000 a month to his staff in addition to the commissions. Stanley sold 160 bicycles in June. If Stanley prepares a contribution margin income statement for the month of June, what would be his contribution margin? O A. $19,200 O B. $108,800 O C. $128,000 O D. $11,200