The Only Way to Lock in a Profit Is to Price What You're Selling

Businesses are going to change how they price their goods. They're knocking a price off of what they paid in the past. And i'll give you an example of how this is going to work. Let's say i buy a bunch of widgets at ten dollars a widget, and my intention is to sell them for 15 dollars. I have a 50 % margin on my widget. So am i going to sell the widget for 15 dollars, even though i bought it for 10? No, because it's going to cost me 12 dollars to replace the widget i just sold. If you think about it in a more extreme example, what if the price of widgets doubles to 20 dollars? Right