Answer: $40,000
Explanation:
Given : Caden started a new job selling dental chairs. He earns a base salary plus a commission for every chair he sells.
The equation gives Caden's annual salary. S. in dollars, after selling c dental chairs. :

To find the base salary , we substitute c= 0 [i.e. if do not sell any chair.] in the above equation.

⇒

⇒

⇒ Caden's base salary= $40,000