Analyze the Aprons $$R$$ Us case below and answer these questions:

$(1)$ What is ARU$$s current production capacity? If ARU is to increase its in$-$house capacity, where should it invest?

$(2)$ With the current production rate, what is ARU$$s total cost per apron? To do this you need to include material, freight, contractor, and the labor cost per apron.

$(3)$ Suppose ARU adds a worker at the bottleneck station, what is the total cost per apron now?

Throughout your analysis, assume that workers are not cross$-$trained, therefore they can only work at their own stations. Also, assume that all the workers are working on ARU orders exclusively.