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 follows:

Average Cost per Unit

Direct materials $ $6\mathrm{.}50$

Direct labor $ $4\mathrm{.}00$

Variable manufacturing overhead $ $1\mathrm{.}60$

Fixed manufacturing overhead $ $4\mathrm{.}00$

Fixed selling expense $ $3\mathrm{.}50$

Fixed administrative expense $ $2\mathrm{.}20$

Sales commissions $ $1\mathrm{.}20$

Variable administrative expense $ $0\mathrm{.}45$

$4.$ If $12,500$ units are produced and sold, what is the variable cost per unit produced and sold? $($Round your answer to $2$ decimal places.$)$