Volume based discount by increments

Hi there

I have delivery data and I want to increase order amount by giving discount based on bulk order.
I am looking to calculate different discount on maximum order scenario.

I want to have incremental approach to volume based more sophisticated version of discount tiers.

It means the discount increases each increased order. Here’s an example of incremental volume based pricing.

Quantity (tonnes) — Discount per 100KG

• 2 - 3 $ 2.50
• 4 - 5 $ 1.20
• 6 - 7 $ 0.60
• 8 -11 0.00
• 12 -15 $ -0.20
• 16 -23 $ -0.30
• 24 -31 $ -0.40
• 32 $ -0.50