Stanley's Bicycles store buys bicycles on average for $600 and sells them on average for $770. He pays a sales commission of 15% of sales revenue to his sales staff. Stanley pays $1,400 a month rent for his store, and also pays $4,000 a month to his staff in addition to the commissions. Stanley sold 140 bicycles in June. If Stanley prepares a contribution margin income statement for the month of June, what would be his operating income? O A $107,800 O B. $9,170 OC. $100,170 O D. $2,230