The monthly demand curve for biofuel is D=18000-100p, and its variable and fixed costs are 180 per unit and P100,000 per month respectively. a. What is the optimal monthly demand that will maximize revenue? (Round up to nearest whole number) (5 pts) Answer: units b. What is the difference between the monthly quantity that maximizes revenue and the quantity that maximizes profit? (Round up to nearest whole number) (5 pts) Answer: units c. What are the breakeven sales quantities (range of profitable demand)? (Round up to nearest four decimal places) (5 pts) Answer: D1 = units D2 units