(6-7) Brown Inc., a merchandising company, reported sales of 2,200 units in June at a selling price of $600 per unit. Cost of goods sold, which is a variable cost, was $364 per unit. Variable selling expenses were $23 per unit and variable administrative expenses were $33 per unit. The total fixed selling expenses were $30,500 and the total administrative expenses were $55,300. 6. The contribution margin for June was: 7. The gross margin for June was