Use the information below to answer the following four questions.

Demand function: P=60+2Q, where P is the unit selling price and Q is quantity of units in thousands.

Cost function: TC= 3Q² - 2Q + 200, where TC is total costs in thousands of dollars.

Determine the optimal sales revenue.

a.

$4,026,000

b.

$2,562,000

c.

$2,057,000

d.

$3,782,000