Login into your CStore Essentials Account

Go to Price Book >

Select Gas Price

Under 'Change gas price' page, enter require New cash price or New credit price

Now Click Send price changes to register

Go to POS Data >

Select Settings

Under General Settings look for POS register's settings

Set required 'Gas pricing options supported by your register?'

Click Update Settings

Go to POS Data >

Select Settings

Under General Settings look for POS register's settings

Set required 'Confirmation email for gas price changes'

Click Update Settings