Let

$$C$($x$)$equals$=1111$xplus$+15001500$

denote the total cost$($in dollars$)$ of manufacturing x units of a certain commodity per day.

$$a$)$ What is the total cost if the production is set at

$3030$

units per$$ day?

$$b$)$ What is the marginal$$ cost$?$

$$c$)$ Use$$ b$)$ to determine the additional cost of raising the daily production level from

$30$

to

$31$

units.