Bolka Corporation, a merchandising company, reported the following results for October: Sales $ 427,000 Cost of goods sold (all variable) $ 173,400 Total variable selling expense $ 21,200 Total fixed selling expense $ 18,900 Total variable administrative expense $ 9,600 Total fixed administrative expense $ 36,300 The gross margin for October is: Multiple Choice $371,800 $253,600 $222,800 $167,600