Solve the Problem $$c(x)=2 x^{2}-58 x+40$$ Where $x$ Is the Number of Watches Repaired

Multiple Choice

Solve the problem.
-Bob owns a watch repair shop. He has found that the weekly cost (in dollars) of operating his shop is given by
$$c(x) =2 x^{2}-58 x+40$$
Where $x$ is the number of watches repaired. What is the cost of operating the shop if the number of watches repaired is 39 ?

A) $\$ 3862$
B) $\$ 780$
C) $\$ 820$
D) $\$ 3024$