Henry is starting a t-shirt printing business and plans on selling each shirt for $30, with his cost being $8 per shirt. The equipment will cost $1200.

Henry orders 600 shirts and determines that the profit for his new business is modeled by the function P = 22x - 1200. What is the domain of this function in this context?
Responses
A all real numbersall real numbers
B {0 ≤ x ≤ 600}{0 ≤ x ≤ 600}
C {0 ≥ x ≥ 600}{0 ≥ x ≥ 600}
D {-1,200 ≤ x ≤ 2,000}{-1,200 ≤ x ≤ 2,000}
E {-1,200 ≤ x ≤ 12,000}