Free Shipping Based on Product Option(s)

Good morning, everyone!

I have spent the last several hours checking out various Demo modules and searching Google, but maybe I'm not using the right search terms, because nothing seems to be appropriate to my client's setting.

On their Opencart 2x store (with Journal), they offer Products that come in various packaging sizes-- which I've set up as Options --> Sizes.

This month, they are offering Product A, which comes in four sizes (7.50-lb, 15-lb, 25-lb, and 50-lb), with Free Shipping if the customer orders either a 25-lb or 50-lb pail of Product A.

But I haven't found a module that offers this feature, and I'm posting here with hopes of finding some sort of solution.

Thank you, in advance!

Ultimate Shipping can do this. You can base charges on product, category, manufacturer, attribute, option, and more, so you can do the rates you're looking for. For example, here's how you'd show a Free Shipping rate (that would apply to the entire cart) if the customer had a 25-lb or 50-lb option for Product A in their cart:

------------------------------------------------------------------------------
CHARGE #1
Title: Free Shipping
Group: A
Charge Type: Flat Charge
Charge Field: 0
Rule: Product is Product A
Rule: Option: Size = 25-lb
Rule: Option: Size = 50-lb
------------------------------------------------------------------------------

Feel free to take a look at the screenshots and demo site, and if you're interested let me know at www.getclearthinking.com/contact if you have any further questions.