Cullumber Inc. produces and sells three products. Unit data concerning each product is shown below.

The company has $2,500$ hours of labor available to build inventory in anticipation of the company's peak season. Management is trying

to decide which product should be produced. The direct labor hourly rate is $$13.$

$($a$)$

Determine the number of direct labor hours per unit. $($Round answers to $2$ decimal places, e$.$g$.52\mathrm{.}75.)$

Direct labor

Product D

hours per unit

Product E

hours per unit

Product $F$

hours per unit