Im so lost on this...

Cannon Precision Instruments makes an automatic electronic flash. The estimated marginal profit associated with producing and selling theses electronic flashes is 𝑃′(𝑥𝑥) = −0.004𝑥+ 20 dollars per unit per month when the production level is 𝑥𝑥units per month. Cannon’s fixed cost for producing and selling these electronic flashes is $16,000/month. What is the maximum monthly profit when selling these electronic flashes? Round your answer to the nearest whole number and justify your solution by showing the appropriate Calculus work.

1 answer

P(x) = -0.002x^2 + 20x + c
Since P'(0) = 20, and there are fixed costs of 16000, c must be 16020.
Better check my logic against what your text says.