For example, the gross profit of eating skewers and drinking skewers is about 60%-70%. Let me briefly talk about the calculation method of an example:

Multiply the serial number of a catty of vegetables by the unit price and subtract the cost of a catty of vegetables, which is equal to gross profit. For example, a kilo of beef 35 yuan can be strung at 180, and the unit price is 0.4 yuan, which means: 180*0.4-35=37 yuan, and 37 yuan is the gross profit of a kilo of beef.