I understand the value of a higher quality item costing more because of the work and expertise put into making it, but requiring specifically 20 times more mithriil to raise the quality of an elven chain shirt seems ludicrous. It may require more specialized tools or a much more expensive sub reagents but because the crafting rules decided to remove time as a very limiting factor and instead make time = cost we need some other method. The shirts require the same amount of material to make, it's the quality that matters right?