QUESTION $1$

A fast$-$food restaurant serves hamburgers, cheeseburgers, and chicken sandwiches. The restaurant counts a cheeseburger as equivalent to $1\mathrm{.}25$ hamburgers, and chicken sandwiches as $0\mathrm{.}8$ hamburger. Current employment is five full$-$time employees who each work a $40-$hour week. If the restaurant sold $700$ hamburgers, $900$ cheeseburgers, and $500$ chicken sandwiches on week, what is the productivity $($in units of hamburgers per labor hour$)?$

$($Provide $2$ decimal places$)$