ELI5: Explain Like I'm 5

Lost sales

Imagine you have a big toy store and you want to sell all of your toys to make money. However, sometimes there are things that can happen that prevent you from selling all of your toys. This is called a lost sale.

For example, let's say you have a popular toy that everyone wants to buy. But one day, your store runs out of that toy and you can't restock it for a while. That means all of the people who came to your store specifically for that toy can't buy it from you. You lost a sale because you didn't have what the customer wanted.

Another example is if someone comes to your store, but they don't like the price of a toy and decide not to buy it. You lost a sale because the person didn't want to pay the price you were asking.

There are many reasons why a sale can be lost, but the important thing to remember is that it means you didn't make money from selling a toy that you could have. It's like if you had a lemonade stand and someone came to buy lemonade, but you didn't have any more cups to serve it in. You lost a sale because you were not prepared to serve the customer.
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