How is the Q of a dragon helm determined?

[Oddity]

(102 * 0.5) + (130 * 0.25) + (115 * 0.25) = 112ql, before softcap. If you get a different result then you don't know your anvil's quality.

[Zeptor]

It looks like necropost, but search is what newb uses

Just want to confirm q = (metalQ * 3 + anvilQ + hammerQ) / 5 formula. Just checked with q31 bronze bars for anvil and hammer creation. And did test with q21 tin nuggets for tankard. Result item was q25 (metalQ*3 case), but not q26 (metalQ*2). No softcaped, sqrt( str * smth ) = 32.