But you don't have invoice them individually. You can lump all of the shops of a particular type into one invoice and the software allows you to add receipts for each individual shop.
When I first started out, I used to group as many invoices on a single scan as I could fit but, in time, I realized it was easier for payroll if I only included one receipt per scan.
The yellow shops require you to submit the receipt along with the photos and then I also submit the receipt with the invoice. The blue and red shops don't have any purchases so I submit a snapshot of the words "No photo required" along with my shopper ID for each invoice I submit.
I tend to group my invoices by type and by date within a given type and of course I document the invoices on my monthly spreadsheet so I check against them when I receive my semi-monthly check from Maritz.
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One buzzard to another while circling high overhead (paraphrased), "Patience hell! I want to shop somewhere."