This module is very use full to add opencart.we can make diffrent shipping method based on shipping amount.

Purpose
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This module is developed to dynamically calculate your shipping cost based on cost of your cart during checkout.

For example you have following scenario
total below $100, shipping cost $10
total between $100 - $150, shipping cost $5
total above $150, shipping for free

Example:
100:10,150:5 (Amount:Cost,Amount:Cost, etc..)