please determine:

a$)$ Fixed costs; Variable costs and Mixed costs $($semi$-$variable$).$

b$)$ Separate from mixed costs variable cost $($per unit$)$ and fixed costs per week. Please show calculations.

c$)$ calculate total production fixed costs per week.

d$)$ total production variable cost per unit.

e$)$ total non$-$production variable cost per unit?

f$)$ total non$-$production fixed costs per week.

g$)$ total fixed costs per week

h$)$ total variable cost per unit?

i$)$ If the selling price of the product is $ $7\mathrm{.}00,$ how much is the contribution margin per unit?

j$)$ If the selling price of the product is $7\mathrm{.}00,$ What is the break$-$even point in units?

k$)$ If $($Table $5)$ selling price is $$8\mathrm{.}00,$ commission increases to $ $1\mathrm{.}20$ per unit $.$ How much is the contribution margin per unit? What is the break$-$even point in units?