Lets say McDonalds charges $2000 for a BigMac. If they offer a deal and sell it to you for $200, did you save $1800? Maybe if you spend $2000 on a BigMac. But

Lets say McDonalds charges $2000 for a BigMac. If they offer a deal and sell it to you for $200, did you save $1800? Maybe if you spend $2000 on a BigMac. But it’s unlikely you would buy such a burger. What is a hamburger worth? Don’t look to McDonalds to set the value.