Calvin Corp., a merchandising company, reported the following results for November: Sales $4,096,400 Cost of goods sold (all variable) $2,194,500 Total variable selling expense $238,700 Total fixed selling expense $144,700 Total variable administrative expense $238,700 Total fixed administrative expense $282,900 The contribution margin for November is: $3,191,400 O $1,424,500 O $996,900 O $1,901,900