The Category Map screen gives you the ability to define shipping costs by product category and is supported using the following shipping methods:
- Shipping by Weight
- Shipping by Order Quantity
- Shipping by Zip Code/Postal Code
To manage your category mappings, navigate to the BuyNow module and select "Setup ->Shipping" from the admin menu:
Next, select the tab titled “Categories”:
Check the checkbox next to the desired categories you would like to define shipping on.
Click the "Save Categories" button to save the Category Map.