[m-] Mario is in the [4] bathroom of the [-ai] high school, trying 賣 to sell his plumbing services. Sitting next to the sink, talking to the students, is a 士 soldier. Mario goes up and offers to help fix up the sinks. The 士 soldier gives him a 罒 net full of 貝 shellfish for payment. Mario accepts, successfully 賣 selling and begins working on the sink pipes. He also 賣 sells some of his 貝 shellfish for real cash to the students that come into the bathroom while he works.