free products
Our sales representatives have a lot of oral agreements with sertain customers. A lot of those involve free products when you buy a sertain amount of a specific product. That is why I like to see a feature in the 'discount codes' section where I can make a 5+1 free offer or a 10+1 on sertain products.

[SANA PRODUCT] Thank you for reporting this feedback! Have you also considered using Sana’s Mix & Match functionality? These are available for some ERPs, including yours (NAV).
You can configure these discounts on the ERP side.
https://help.sana-commerce.com/sana-commerce-93/erp-user-guide/nav/mix-and-match-discounts