OT How do pumps know when to turn off

[vacock]

 

[Pepsicock]

I want to know why they have 9/10 on the price of gas

 

[Harvard Gamecock]

I want to know why they have 9/10 on the price of gas

 

[18IsTheMan]

Gas used to be sell for cents/gallon. it was marketing to have a fraction of a cent added on instead of going up a whole cent.