The only way to never sell out of bananas is to order enough that a portion always goes bad before selling. No matter how much sales you do, there's an inherent

The only way to never sell out of bananas is to order enough that a portion always goes bad before selling. No matter how much sales you do, there's an inherent trade-off between the amount waste and amount of temporary sell-outs. That is a problem all stores have to deal with, and they have to choose some policy for it. Similarly, stores have a policy about what to do when there is a sell-out (leave the shelf empty or put something else there). Each policy decision has pros and cons, and no store is immune to these issues.