[Eliezer]

Hi! This is the Market Economics Fairy! I help supply and demand equilibrate everywhere! If you're turning away customers it means you've set your prices too low! Raise your prices until you have exactly as many customers as you can handle!

Sincerely, the Market Economics Fairy!

[maushu]

I also recommend playing a game like lemonade tycoon, it pretty much explains stuff like this.