$($b$)$ Stapleton Manufacturing intends to increase capacity through the addition of new equipment. Two vendors have presented proposals. The fixed cost for proposal A is $$65,000,$ and for proposal $B,$$$34,000.$ The variable cost for $A$ is $$10,$ and for $B,$$$14.$ The revenue generated by each unit is $$18.$ At an expected volume of $8,300$ units, which alternative should be chosen? $[2$ marks$]$