This is usually caused by an error from a vendor, or it could be that the restaurant updated the invoice total and the amount still doesn't match the corrections made on the invoice.
Here are the steps to fix the invoice and verify it:
1) Click into an invoice under Needs Attention marked "Invoice total doesn't match item total"
2) Ensure all item have been entered correctly. You can always ADD or REMOVE items if necessary.
3) Edit the invoice total amount to match the line item total (Plus tax amount if available) if needed.
4) Click Save and Mark the invoice as Verified
If unsure of the Edits needed on the Invoice, simply Flag it and tag "@support" to reprocess or check it.