Q: How do I create a multi-pack item?
A: You can create a multi-pack (more than 1 of a specific item).
You could kind of make it work by processing a multi variation listing on Sku Fetch and when the editor comes up, you would have to override your price formula -- basically set the formula up as if it is a quantity of 1... and once done, set manual override to YES... and enclose the entire formula in another set of parentheses so that it's like this -- if the normal formula is "formula" you would do this (formula) and put *2 at the end ... so that it's like this (formula)*2 that would double everything inside of the parentheses.
You would then go to the bottom to the variation attributes and change the variation labels that you are listing to say what you want them to say -- for example 2 x 3lb (6lbs Total), and proceed to list your item.