If a dept gets x amount of calls at a cost of y X amount was

If a dept. gets x amount of calls at a cost of y. X amount was amount of calls belonged to dept. a and the rest to dept. b. How do you find the cost allocated to each dept?

Solution

Two departments A & B are receiving calls.

Department A gets x calls and both departments combined together get X calls. So department B gets (X-x) calls.

So cost for department A = (x) * y

Cost of Department B = (X-x) * y