Update Stall Sites by Group

The Stall Site hire fee invariably changes from year to year.
Altering each site's fees individually can be time consuming and error prone.
To make it easier to update multiple stall sites, when initialising the stall sites give all like sites the same Group Code.
This screen will update all sites with the same Group Code to the specified value.
Currently, Stall Extras cannot be updated by Group so they have to be manually altered site-by-site.

Note that there is no undo after this operation.