Part II. Calculation Problems 80% 1. (10%) A company has determined that the price and the monthly demand of one of its products are related by the equation D=(400p), where p is the price per unit in dollars and D is the monthly demand. The associated fixed costs are $1,125/ month, and the variable costs are $100/ unit. (a) What is the optimal number of units that should be produced and sold each month? (b) Please calculate the breakeven point