Bonus Buy / Rebate in kind inclusive

Hello,

I wanted to create bonus buy conditions to implement rebate in kind, as stated in this scenario:

When buying 5 items “CUP OF COFFEE”, the customer should get one of the 5 items for free. So, he buys 5 items and receives 5 items, but only pays for 4.

I think this is referred to as rebate in kind inclusive.

Unfortunately I could not figure out how to implement this scenario with bonus buy.

I only could figure out how you implement rebate in kind, exclusive (see attached screenshot).

How can I create a rebate in kind inclusive with SAP Retail Bonus Buy?

Thanks a lot

Best,