Level 2

Enabling multiple pricing feature

Hello Intuit community? It happens that I have UK Enterprise 14 and need to have 2 pricing such that total pricing per carton will be less cumulatively compared to one buying in packets. An example is a packet of 6 satchets of milk sells @ 5$ and a carton contains 4 packets. That shows  a customer buying 4 packets separately will buy @ 20$. Now it happens that a customer buying 1 carton will buy @ discounted price of 19$. Kindly assist how I can set these multiple pricing.