translation.en: And, after an initial cost of 60 bucks to buy the bacteria, which you'll never have to pay again, one cubic meter of bacterial sand would be about 11 dollars.
translation.zh: 最初我们需要用60美元来买细菌， 之后你就不用再为细菌花钱了， 那样算下来的话一立方米带细菌的沙子 大约是11美元。