Receivable Ageing report options?

[Katie Eldridge]

Dear all,
I'm a fairly new user of Gnucash and double entry book-keeping, and just 
went to see the accountant for our company year end.
He liked all the reports I'd given him, but also wanted a list of 
outstanding invoices (with total for each invoice) at the year end as a 
break down of the Accounts Receivable line on the balance sheet.

I assumed that this would be in the receivable ageing report options, 
but that only shows a per customer total for amounts currently 
outstanding, even when I change the date (ie if the date is the end of 
August it shows the amount outstanding now of items which had been 
invoiced by then, rather than the invoices outstanding then, some of 
which have now been paid).

Is there an easy way of getting such a report, or would this need a 
custom report using eguile (which looks rather beyond my limited 
programming skills)?

Many thanks in advance for your help,

Katie