Process payment request that has a vendor with credit balance

I would like to know how I can process a payment for multiple vendors who have the same payment due date and who also have the same remit to (i.e. payment relationship with a 3rd party), where one of the these vendor has a credit balance.

e.g.

Vendor A - Invoice 1 - Due date 18-Feb-2105 - $100 - Remit to Vendor C

Vendor B  - CM 1 - Due date 18-Feb-2105 - ($10) - Remit to Vendor C

I need to process a Net payment of $90 to Vendor C.

In payment manager I am restricted from process the payment for Vendor B since its a negative amount.