Price per piece

Hi all,

I’d like to change service price from kg to piece.

I create trade agreements with price per pieces but If I’m going to create new sales order I can’t apply there price per piece because unit “pcs” is not convertible. I can use only units which system can convert from kg.


In column “all” there are many of units but I’m not able to use them.

Have you some ideas if it is possible to change it?