A popular video game retailer develops apps. The total profit, in dollars per day, after x days can be modeled by the function R(x) = 3x3 – 21x2 + 21x + 45. The total cost, in dollars per day, after x days, can be modeled by the function C(x) = x2 – 2x – 3. What is (R - C)(10) and what does it mean in the context of the problem?

a
$532, the total revenue made after 10 days
b
$532, the profit made after 10 days
c
$1078, the profit made after 10 days
d
$2255, the total revenue made after 10 days