Luisa Rentals offers machine rental services for concrete cutting. Consider the following costs of the company over the relevant range of $4,000$ to $10,000$ hours of operating time for its concrete cutting equipment.

Hours of Operating Time

$4,000$

$5,000$

$8,000$

$10,000$

Total Costs:

Variable Costs

$ $20,000$

$?$

$?$

$?$

Fixed Costs

$82,000$

$?$

$?$

$?$

Total Costs

$$102,000$

$?$

$?$

$?$

Cost per hour:

Variable cost

$?$

$?$

$?$

$?$

Fixed cost

$?$

$?$

$?$

$?$

Total cost per hour

$?$

$?$

$?$

$?$

What is the estimated total cost per hour at a volume of $8,000$ hours?

Select one:

A$.$

$$15\mathrm{.}25$

B$.$

$$14\mathrm{.}25$

C$.$

$$18\mathrm{.}00$

D$.$

$$12\mathrm{.}50$