Hi Edward
Change the & characters to + characters. I think that might work. Otherwise please tell us what the selection formula is because if all you want is a date range it's much easier and more logical to prompt for two dates - a start date and an end date.
Can you give us more details on the invoice report? Are the invoices "sales" or "purchases". I ask because sundry items are a term used by purchase orders, and if you mean sales, then please use a different phrase.
Steve