problem about Managerial Economics and Accounting

1. Jim is considering quitting his job and using his savings to start a small business. he expects that his costs will consist of a lease on the building, inventory, wages for two workers, electricity and insurance.

a. identify which costs are explicit and which are opportunity costs

b. identify which costs are fixed and which are variable

2. Jill resigns from her job at which she was earning 50,000 per year and uses her 100,000 savings, on which she was earning 5% interest, to start a business. In the first year, she earns revenue of 150,000 and her costs are as follows

rent 25,000

utilities 12,000

wages 30,000

materials 20,000

a. find out Jill's accounting profit

b. find out Jill's economic profit

3. Suppose that a firm's only variable input is labor. When 50 workers are used, the average product of labor is 50, and the marginal product of the 50th worker is 75. the wage rate is 80 and the toal cost of the fixed input is 500

a. What is average variable cost? Show calculations

b. What is marginal cost? Show calculations

c. What is average total cost? Show calculations

d. Is each of the following statements true or false? describe

1. Marginal cost is increasing

2. Average variable cost is increasing

3. Average total cost is decreasing