Rebate Scales - Graduated to Interval scale
Does anybody know how "Graduated to Interval scale" works in Rebates.
My scenario is - Buisness doesn't want to give rebate on first 500 LB's, if the sales
order is for 800 LB's, Buisness wants to give rebate on only 300 LB's.
Let's say rebate is $2/- per LB, customer should get only 300 LB x 2/- = $600 only.
In standard scale, customer gets rebate on whole qty i.e. 800 LBx2= $1600 but here
situation is that customer should get rebate only on 300 Lb's.