The Franklin Co. is analyzing a proposed project. The company expects to sell 3,500 units, give or take 15 percent. The expected variable cost per unit is $6 and the expected fixed costs are $15,500. Cost estimates are considered accurate within a plus or minus 5 percent range. The depreciation expense is $6,000. The sales price is estimated at $21 a unit, give or take 3 percent. The company bases their sensitivity analysis on the base case scenario. A) What is the sales revenue under the worst case scenario? B) What is the contribution margin under the base case scenario? C) What is the amount of the fixed cost per unit under the best case scenario? D) The company conducts a sensitivity analysis using a variable cost of $10. The total cost estimate, excluding depreciation, will be: