This extension allows you to set shipping rates based on the "geo zone", "weight" and item quantity.

If you set weight from/to equal 0, then weight constraint will be ignore (is equal -/+ infinity).

If you set "Description" empty, then "Description" will be get from language file.

You can set price for first and each next item.

Example 1: In the cart are 3 items. Sum of it weight is 10. We have rule "Weight more than: 5", "Weight less or equal: 10", "Rate for first item: 5", "Rate for each next: 1". The total shipping cost for this order is: 5 + 1 + 1 = 7.

Example 2: In the cart are 2 items. We have rule "Weight more than: 0" "Weight less or equal: 0" "Rate for first item: 10" "Rate for each next: 2". The total shipping cost is 10 + 2 = 12

INSTALLATION :
Upload contents of the .zip file to root folder of installed Opencart. Go to : Extensions -> Extensions -> Shipping -> Search for "Geozone Weight/Quantity Based Shipping" - Click install icon.

Tested on OpenCart 3.0.3.8 and PHP 7.3. Should works on OpenCart 3.x and PHP 5/7/8.