Value$-$Stream Costing Objective Required: $1.$ Assume initially that the value$-$stream costs and total units shipped apply only to one model $($a single$-$product value stream$).$ Calculate the unit cost. $\backslash (\backslash$$ $\backslash )$ per unit $2.$ Calculate the unit cost for Models A and B $.3.$ What if Model $\backslash ($ A $\backslash )$ is responsible for $40$ percent of the materials cost? Calculate the unit materials cost for Models $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash ).$ Unit Cost Calculate the total unit cost for Models A and B$.$