Complete the table below by calculating total cost:

Cost Type

Cost

Total Cost $($nearest dollar$)$

$15$ units

$50$ units

$75$ units

Variable

$$3/$unit

The correct answer is:

Question $12$ Answer

a$.$

$15$ units

$50$ units

$75$ units

$$15$

$$50$

$$75$

b$.$

$15$ units

$50$ units

$75$ units

$$45$

$$45$

$$45$

c$.$

$15$ units

$50$ units

$75$ units

$$3$

$$3$

$$3$

d$.$

$15$ units

$50$ units

$75$ units

$$45$

$$150$

$$225$