translation.en: I'm not an economist, very much not, but I did, quite literally, a back of the envelope calculation --  -- and it seems that for a cubic meter of concrete we would have to pay in the region of 90 dollars.
translation.zh: 我一点也不像个经济学家， 但是，我做了一个——照字面来说的——封底运算……  看起来一立方米粘结物 要耗费我们90美元左右。