Marginal cost function C$\text{'}($q$)$ is given in the figure below. If the fixed costs are $$10,000,$ estimate the following. 

 

 $$/$unit 

 

$30$

 

$24$

 

$18$

 

$12$

 

 $-$C$\text{'}($q$)$ 

 

$15$

 

$30$

 

$45$

 

$60$

 

$75$

 

$909$

 

 $($quantity$)$ 

 

 $($a$)$ What is the total cost to produce $45$ units?