Without an extension, is there a Magento ver. 220.127.116.11 coding or any other method to disable a shipping option in the shopping cart if a customer places an order for that contains an item other than specific item.
In other words, We have a "Special Shipping" option of $7 that only appear for items A, B, & C. Currently, if a customer adds any or all of items A, B, & C with any other items, the “Special Shipping” will come out to be $7 per items A, B, & C quantity. This will usually show up as the cheapest shipping option a customer can pick, which can be costly to us.
The psedo code would go like "if item in cart is contains any or all of items A, B, & C, then disable special shipping."