if i want to make slides of discounts on sales invoice amount
for example if customer buying from 500 to 1000 giving him discount 2% and if he buy from 1001 to 2000 giving him discount 3% and if he buy from 2001 to 3500 give him discount 5% And so on
if customer purchase more than 1 amount up to 500 amount he enjoys 1% discount
and if he purchase more than 501 amount up to 1000 amount he enjoys 2% discount
And so on