Issue with Freight condition with scales

Question

HI Experts
We have requirement like below.
When customer send an order
o     if the order contains materials for a minimum quantity the system should not apply freight condition
o     if the order contains materials for less than minimum quantity the system should apply freight condition
For example: sales condition freight has scale
     scale qty     unit     amount     unit
From     0     PC     18,3     u20AC
     4     PC     0     u20AC
e.g.1  customer send order that contain 9 PC, so system NOT apply freight condition
material     quantity
x1     1
x2     1
x3     2
x4     5
e.g.2  customer send order that contain 2 PC, so system apply freight condition
material     quantity
x1     1
x2     1
For this we have maintained Group condition and maintained scales up to 3 Order quantity 18 EUR . If order quantity is greater than 4 condition should not apply.
But Now our issue is when ever Material determination is occurring in Order our condition is going to fail. For example  order quantity is 2 with TAPA item(parent item) and so substitute Item also 2 quantity (Tan item). In this case system is reading order quantity as 4 and our condition is 0. But actual quantity is 2 condition should apply in Order.
Could you please suggest us where we can control this kind of scenario.
Regards, Lakshmikanth

Answer 1

Done through user exit