calm down m8... we already know its impossable
the calculater works off rules similer to the theory i just stated...
well i didnt actualy state that so i will now:
WLO compounding theory: the level of the item with the lowest level acts as an anchor for compounding, if an item in the primary slot is lv 1 and an item in the secondary slot is lv 20 you can only get a lv 8 item, it also works vice verse, if the lv 20 item is primary and the lv 1 item is secondary, you get the same exact chances.

and thats all of the theory that you need to know.