The following information applies to the questions displayed below$]$

Martinez Company's relevant range of production is $7,500$ units to $12,500$ units. When it produces and sells

$10,000$ units, its average costs per unit are as followWS:

Direct materials

Direct labor

Variable manufacturing overhead

Fixed manufacturing overhead

Fixed selling expense

Fixed administrative expense

Sales commissions

Variable administrative expense

Average Cost

Per Unit

$ $6\mathrm{.}00$

$ $3\mathrm{.}50$

$ $1\mathrm{.}50$

$ $4\mathrm{.}0$e

$ $3\mathrm{.}00$

$2\mathrm{.}00$

$ $1\mathrm{.}00$

$ $0\mathrm{.}50$

$13.$ If the selling price is $$22$ per unit, what is the contribution margin per unit?

Note: Do not round intermediate calculations. Round your answer to $2$ decimal places.