audio products, inc., produces two am/fm/cd players for cars. the radio/cd units are identical, but the mounting hardware and finish trim differ. the standard model fits intermediate and full-size cars, and the sports model fits small sports cars. audio products handles the production in the following way. the chassis (radio/cd unit) is assembled in mexico and has a manufacturing lead time of two weeks. the mounting hardware is purchased from a sheet steel company and has a three-week lead time. the finish trim is purchased from a taiwan electronics company with offices in los angeles as prepackaged units consisting of knobs and various trim pieces. trim packages have a two week lead time. final assembly time may be disregarded because adding the trim package and mounting are performed by the customer.