3. Calculate the missing amounts (use what you know to solve for what you don't know) for each of the following departments in a supermarket: Vegetables Bakery Dairy Total sales ? $15,000 $50,000 Total variable cost $12,000 ? ? Total contribution margin ? ? ? Contribution margin per unit $2 per kg ? $2 per litre Total fixed cost $2,000 $5,000 $15,000 Departmental operating income $10,000 nil $5,000 Units sold 6,000 kg 5,000 pieces 10,000 litres