We use LS retail based on Dynamics NAV 2017. 

We are renting out recreational equipment and for some of our member types there is no charge.  Nonetheless, we want to track these transactions with an INFOCODE tracking the 100% discount for statistical reasons.  

The discount is applied to the line item and is working correctly, reducing the value of the bill to $0.00.  

However, now that the value of bill is zero, we are unable to get past the Tender button with its TOTAL command because there is nothing to total.

How do I get the Tender button to process when the balance is zero?