Hello, can you please review attached and help me with the answer ?

Answer:
(a). P(x) = 8x - 112,000
(b). $80,000
Step-by-step explanation:
(a). P(x) = R(x) - C(x)
P(x) = 50x - 112,000 - 42x
P(x) = 8x - 112,000
(b). P(24,000) = 8(24,000) - 112,000 = 80,000
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(a). P(x) = 8x - 112,000