3 jobs in Economics

1. Fig. It shows the curve of production possibilities. Suppose that we are at the point A. What characterizes this point? What changes will move to point B? What are the possible ways to return to the point A? What does the point C?
2. Company - "pure" monopoly. If it finds a price of 50 currency units, then sell 1 unit; reducing it to 45 monetary units will sell 2 units. By reducing the price by 5 monetary units for each expansion of sales per additional unit of output, which company will receive the marginal revenue (MR) and total revenue (TR)? Make a table and graph of total revenue.
P Q TR MR
50 1? ?
45 2? ?
3. The amount of the company during the 30 pieces, and the costs are as follows: raw materials 200 rubles., Rent 100 rub., The salary of the workers 900 rubles., Amortization of 100 rubles., Manager salary of 500 rubles. Average total costs of the company are ___ rub.