“Hmmmm, that clears up one problem, Roy,” Grant continued, “but while I’ve got you on the phone, let me tell you my second big headache. It all has to do with inventory. When I buy a lot, I get a good deal on the price, but my costs go up and I lose money – or don’t make as much. When I buy lower quantities, I sometimes run out and then my customers are irate. What’s your advice on that?”
 
 What advice will Roy offer?