Hottenstein, Giffith, and Hult, attorneys at law, do a great deal of printing. The firm uses a single type of printer with annual demand for print cartridges of 480 per year. The order cost is $15 per order, and the carrying costs is 20 percent per cartridge per year of the purchase cost of #35 per cartridge.
a. How many print cartridges should the firms order at one time?
b. What is the time between orders?