Example: Fried Tremella with fresh yam.
Ingredients: fresh yam 1 kg *6.5 yuan =6.5 yuan.
Yuner 0. 1 kg *6.5 yuan =6.5 yuan
Ingredients: red pepper and 0.2 yuan.
Seasoning: salt, essence, oil 1 yuan.
Total cost: 14.2 yuan price: 28 yuan/gross profit per share: 49.3%.