Take 1 kg soybean as an example: 1 kg bean sprouts can be sold to 1.5 yuan in the market, but the cost of producing bean sprouts is generally around 2 yuan 1 kg, and one kg soybean can produce 8 kg bean sprouts. Therefore, the profit of planting bean sprouts with soybeans is 8* 1.5-2= 10 yuan. And mung bean sprouts. A kilo of mung beans in 2.5 yuan can produce seven kilos of bean sprouts, and a kilo can be sold in 2 yuan. The profit is 7*2-2.5= 1 1.5 yuan. In addition, whether the calculation of mass production is green depends on the scale of production. If it is a husband-and-wife file, the biggest cost is to save labor costs. If it is small-scale, the labor cost can be the biggest project cost except taxes, mechanical loss, factory rent and water and electricity costs.