Our company used to give free goods to the customers. Its maintain in VBN1 (exclusive). If the customer buy say material u2018Au2019 10 cartons than he will get material u2018Bu2019 1 cartons as a free. But now offer is like this if he buy 20 cartons than he will get material u2018Bu2019 2 cartons plus he is eligible to get additional material u2018Cu2019. so if he orders 20 cartins than he will get :
Mat. u2018Au2019(main mat.) 20 cartons + mat.u2019Bu2019( free good) 2 cartons + mat u2018Cu2019 (free good) 1.
How it maintain in sap?