Bolka Corporation, a merchandising company, reported the following results for October Sales Cost of goods sold (all variable) Total variable selling expense Total fixed selling expense $ 444,000 $ 177,500 $ 22,400 $ 24,100 Total variable administrative expense10,500 $ 32,900 rotal fixed administrative expense The gross margin for October is: Multiple Choice $266,500 $233,600 $387000 $176,600