[1276amaranth]

Trade-up contracts allow you to exchange ten skins of the same rarity for one skin of the next highest tier, but the outcome is determined by complex math involving the average float. I am trying to hit a Factory New AK-47 Printstream by using two high-value inputs and eight cheap "filler" skins from different collections to keep the cost down. My concern is that the float of the fillers might drag the final result down to Minimal Wear, which would result in a massive financial loss. Does anyone have a reliable formula for calculating the required average float of the fillers to guarantee a Factory New output from a 0.06 target skin? I want to avoid the "gambler's ruin" where I end up with nothing after ten tries.