Pet peeve: "about 200 €/m² including labour" is not supposed to be accurate to 4 significant figures - and even if it was, the EUR/USD exchange rate varies by more than that from day to day. "$25 / square foot" is much better if you treat it as a translation rather than mindlessly plugging numbers into a calculator.
(Maybe I'm just being a grumpy old man, but I deal with this sort of thing all the time in my day job and it winds me up something rotten).
(Maybe I'm just being a grumpy old man, but I deal with this sort of thing all the time in my day job and it winds me up something rotten).