Assuming that excess demand for the ex123 is back-ordered from one three-month period to the next. Assume a loss-of-goodwill cost of $ 100 for customers having to wait until the next three-month period and a cost of $50 per customer for bookkeeping expenses. What is the overage cost? $ [ select ] what is the underage cost? $ [ select ] what is the critical ratio? [ select ] how many cars should happy henry's be purchasing every three months? [ select ] cars (round up to next integer)