The demand curve for product a is given as Q = 2000 - 20P.

a. How many units will be sold at $10?

b. At what price would 2,000 units be sold? 0 units? 1,500?

c. Write equations for total revenue and marginal revenue (in terms of Q).

d. What will be the total revenue at a price of $70? What will be the marginal revenue?

e. What is the point elasticity at a price of $70?

f. If price were to decrease to $60, what would total revenue, marginal revenue, and point elasticity be now?

g. At what price would elasticity be unitary?