Belinda is the owner of a department store. Last year, her…

  Belinda is the owner of a department store. Last year, her total revenue was $525,000 and her total labor costs were $200,000. Her overhead expenses, including insurance and legal fees, were $175,000. The rent on the building was $40,000. Belinda could earn $100,000 per year working at a nearby department store. If her total revenue increases to $600,000 this year and all of her other expenses are held constant, we know that her economic profit is now

  Suppose a perfectly competitive paper firm can produce six…

  Suppose a perfectly competitive paper firm can produce six tons of paper at an output level where marginal revenue is equal to marginal cost. The price per ton of paper is $100 and the average total cost is $75. What is the total profit or loss that the paper firm is earning?