Then tell me using the German rules the price of a broad head for an arrow, also please do note the style, or brand because surface area will vary some. Mine might look more complicated, but covers more armors with out using bs cm2. While the rules are more relistic, it can take more time than it really should, especially for those that will metagame the crap out of stuff to save a dime. Or use a less realistic but also more general equation, like the one I suggested.
Example of what I mean:
Armored kilt (why kilt who cares) which is a flavored armored clothing in diote. After convering 6 yards to cm you get 548.64cm and since measurement for length varies per wearer we will go with 25cm from navel to mid of knee whifh 548.64x25=13716 cm2, for which dikote cost 1000/100cm2= 137160¥ for the traditional armored kilt, but not the jacket or anything else. Or using mine 6*2000*1 (human/elf) = 12000¥ for the armored kilt which is A) cheaper and B) a lot less math. Why would someone go through this much trouble you might ask? Because I am the type of person who enjoys knowing how much fabric is actually in a kilt.
So, yes while I do prefer simpler rules, if you say it cost X/cm2 then I will actually figure out what its actually surface area is using the closest real world example, hence the statement earlier about combat knives or swords are not the same size. And yes, I choose a kilt because there is more cloth in it than people realize, but luckily its a rectangle turned into a tube, unlike trying to deconstruct and measure a set of pants or jacket.