Question Content AreaIf at a given volume total costs and fixed costs are known, the variable costs per unit may be computed with which of the following formulas?

a$.($Total costs $$ Fixed costs$)-$: Unit volume

b$.($Total costs $\backslash$times Unit volume$)($Fixed costs $-$: Unit volume$)$

c$.$ Total costs $($Fixed costs $-$: Unit volume$)$

d$.($Total costs $-$: Unit volume$)$ Fixed costs