How to Implement Price List

[santhida]

1. 1 to 3 kg, 10 USD (Total Price)
2. 3 + to 10 kg, 20 USD (Total Price)
3. 10+ kg, 20 USD + additional 3 USD per kilo
   example 15 kg
   basic 20 USD plus 5*3 = 15 USD
   Total 35 USD
   can someone help ?