Sattler Corporation has provided the following contribution format income statement. All questions concern situations that are within the relevant range. Sales (8,000 units) Variable expenses Contribution margin $480,000 336.000 144,000 Fixed expenses 142.200 Net operating income $1.800 Required: a. What is the contribution margin per unit? (1 mark) b. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 15% increase in sales? (1 mark) c. What is the break-even point in unit sales and in dollar sales? (1+1-2 mark) d. What is the margin of safety percentage? (1 mark) e. Estimate how many units must be sold to achieve a target profit of $50,400. (1 mark) f. If the variable cost per unit increases by $5, spending on advertising increases by $2,000, and unit sales increase by 3,400 units, what would be the estimated net operating income? (2 mark) g. If Sattler has an opportunity to sell 400 units to a wholesaler without disturbing sales to other customers or fixed expenses, what price would it quote to the wholesaler if it wants to increase monthly profits by $6000? (2 marks)