6- Suppose a firm faces the following demand for their product:
P=100-Q. Further assume that the marginal cost to produce the
product is $10 and that the fixed costs are $15. The firm is
thinking of implementing the following pricing technique: sell as
much as it can at a price of $40 then decrease the price to $25 and
sell as much as it can. How much profit is the firm going to make
under this scheme?