I want to create a report that shows proposed payments to suppliers in this form

Account, Amount to pay, Invoices

ABC001, 1000.00, KFabc01 KFabc02 etc

The difficult bit is creating the list of invoices to pay.

My thoughts are that the detail level would be each invoice

On the Account Header you initialise a variable to blank

On each detail line you append the current reference to the variable

On the Account Footer you have the final list displayed

Repeat for each account

I do not see if it is possible to assign values to a variable in this way with report designer