3. A company produces an electronic timer switch that is used in commercial and consumer products. The fixed cost is $73,000 per month, and the variable cost is $83 per unit. The selling price is p=$180-0.02D. a. b. C. Determine the optimal demand of this product and confirm that profit occurs at this demand. What is the demand that will give maximum revenue of this product and how much is the total revenue? Find the demand at which breakeven occurs and the range of profitability