Ace Manning Corporation, a merchandising company, provided you with the following results for its operations in July. Sales Cost of goods sold (all variable) Total variable selling expense Total fixed selling expense Total varlable administrative expense Total flixed administrative expense $414,800 $175,100 $ 17,700 $ 14.800 $ 8,200 $30,700 The gross margin for July is: O $369,300 O $213,800 O $239,700 O $168,300