Kubin Company$$s relevant range of production is $16,000$ to $24,500$ units. When it produces and sells $20,250$ units, its average costs per unit are as follows: Average Cost per Unit Direct materials $ $7\mathrm{.}70$ Direct labor $ $4\mathrm{.}70$ Variable manufacturing overhead $ $2\mathrm{.}20$ Fixed manufacturing overhead $ $5\mathrm{.}70$ Fixed selling expense $ $4\mathrm{.}20$ Fixed administrative expense $ $3\mathrm{.}20$ Sales commissions $ $1\mathrm{.}70$ Variable administrative expense $ $1\mathrm{.}20$ Required: $1.$ For financial accounting purposes, what is the total amount of product costs incurred to make $20,250$ units? $2.$ For financial accounting purposes, what is the total amount of period costs incurred to sell $20,250$ units? $3.$ For financial accounting purposes, what is the total amount of product costs incurred to make $24,500$ units? $4.$ For financial accounting purposes, what is the total amount of period costs incurred to sell $16,000$ units?