how to assign a discount based on the sum of quantutès a group of items in a sales order

hello group,

We need pricing groups of items based on total quantity ordered:

Take for example a group of items (A1, A2, A3, A4 ......) final type of item, all items are of the same group (SRP1)

in the entry of the sales order P4210

if the total quantities ((A1, A2, A3, A4 ......) = 5 the system must apply a discount of $ 10 on the articles of the same group

is that possible?

Error Codes