To update the cost of any given package, follow the steps below.
Note: this will update anyone that currently has the same package, works like a template.
Log into Fons. Navigate to Settings->Package tab, scroll down to your list of packages
Select the package you would like to edit
Input the new rate
Click Save
The new rate will go into effect the next time the package is purchased. Whether that is a manual purchase or it is set to auto-repurchase when the balance hits 0.
If the client has credits remaining from a previously purchased package they will remain available and will be used up as normal.