There are two types of invoice submission modes you can specify for your licensors. These are Positive & Negative Statements or Positive Statements Only

This can be specified on the licensor details page by going to:

Royalty > Licensors > Choose Licensor

Positive & Negative Statements

Positive & Negative Statements means that the total amount your licensor is invoicing for is the sum of all their outstanding statements, meaning they are cross recouped.

Positive Statements Only

Positive Statements Only means that the total amount they invoice for includes just the sum of the positive statements and will ignore any negative statements. This is useful if you have a contract specific to each release and you don't want the royalties of one contract to contra another.