Consider the following data for Magnimus Corporation. July August September Sales in units 3, 800 4, 800 5,000 Sales revenue 000 '668$ $504, 008 $525, 000 Direct materials 75, 240 95, 040 99, 000 Direct labour 87 , 400 110, 400 115, 000 Manufacturing overhead 63,930 71, 930 73, 530 Sales commission 22, 800 28 , 800 30, 000 Other selling expenses 43, 570 47, 570 48, 370 Administrative expenses 36, 300 36, 300 36, 300 Required: Write the cost equation for sales commission. (Round your answer to 2 decimal places.) Y= X