I've been looking through previous posts and think I may need a customisation to do this but thought I'd just put it to the experts. Apologies if this has been covered a million times before...

We have shipping using a table that calculates the charge based on total cost. However, some items are heavy and need extra added on. Can this mixture of table-based and weight be done?

I guessed that it may be possible if the weight is 0 for everything except the things where weight matters.

Any help as usual greatly appreciated.