The ABC marketing consulting firm found that a particular brand of tablet PCs has the following demand curve for a certain region:

Q = 10,000 - 200P + 0.03Pop + 0.6I + 0.2A where Q is the quantity per month, P is price ($), Pop is population, I is disposable income per household (S), and A is advertising expenditure ($).

a. Determine the demand curve for the company in a market in which P = 300, Pop = 1,000,000, I = 30,000, and A = 15,000.

b. Calculate the quantity demanded at prices of $200, $175, $150, and $125.

c. Calculate the price necessary to sell 45,000 units.