Using a plantwide overhead rate based on $2,500$ direct labor hours, compute the total product cost per unit for each product$\mathrm{.}2.$ Consider the following additional information about these two products. If activy$-$based costing is used to allocate overhead cost,$($a$)$ compute overhead activity rates, $($b$)$ allocate overhead cost to Product A and Product B and compute overhead cost per unit for each, and c compute product cost per unit for each.