Hello! I configured properties of my products in a way, that customer can choose in which packaging (quatity) he would like to buy a product (by piec: 1,2,3,4... or by pack of 20). I would like to know if there is a way to code step quantity values to my pack of 20 property. So if customer would choose pack of 20, he could only input values of 20, 40, 60....
Please help!
Best regards!