'3) Zesty Tomato Company manufactures jam and ketchup. Sales price and cost data for both products follow: Jam Ketchup Sales price $20.00 $42.00 Variable manufacturing costs 12.00 2000' Sales commission (10%) 2.00 4.20 The company has three sales representatives: Units Sold. Jam Ketchup Paul Kowalski 2000 2'50 Miriam Omer 2,520 650 Ma}; Sasaki 2, 300 900 Calculate the total contribution margin and the contribution margin ratio for each sales representative