The most time-consuming part of selling variety packs is making the labels. For that reason, you want to make enough of the product to make it worth your while, since each combination of lots used in any one pack will require its own label.
Goal: create 1000 units of a '"variety" 4-pack, each containing 4 x 1 gram pre-rolls of 4 different strains:
Create a new Product "Variety Pack" of type = Usable MJ, weight = 4 grams
Find the 4 Lots you're going to use, and write down the cannabinoid lab results you need to show on the label (you'll need these later)
From Inventory>Convert, choose the new 4 gram variety pack, select 1000 grams from each of the 4 different (tested) Flower Lots
Enter quantity = 50 units
Create a custom label:
Create a new label for type = Usable MJ and call it "Variety Pack"
Manually type in all four strain names, their lot compliance IDs, and all four sets of THCA, Total THC, CBDA, Total CBD and any other cannabinoid data you want to show (get the information by clicking on the variety pack's ID button, then each of its parent Flower Lots to see the individual lab results)
Also type in any required pesticide information for each strain's lot.
Assign the new label you made to the specific Variety Pack product.