If $8,000$ units are produced, what is the total amount of manufacturing overhead cost incurred to support this level of production? What is this total amount expressed on a per unit basis?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 $ $6\mathrm{.}40$

Direct labor $ $3\mathrm{.}90$

Variable manufacturing overhead $ $1\mathrm{.}40$

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

Fixed selling expense $ $3\mathrm{.}40$

Fixed administrative expense $ $2\mathrm{.}10$

Sales commissions $ $1\mathrm{.}10$

Variable administrative expense $ $0\mathrm{.}55$If the selling price is $$22\mathrm{.}40$ per unit, what is the contribution margin per unit?What incremental manufacturing cost will Martinez incur if it increases production from $10,000$ to $10,001$ units?