(120+64+40+25+10+5+2+5)/90 = 3.01This is theoretical. But your water and electricity, store rent and money for hiring people should be included in your daily expenses. Let's take the cheapest one as an example: the store rent is assumed to be 3000 yuan (I don't know where you are, from here), and the water fee is calculated at one day 100 yuan and one month in 30 yuan. The electricity bill is not more than 2 degrees a day, and it costs 1000 to hire a waiter. Daily expenses 10 yuan. Your bucket of rice costs almost 4 yuan. And I don't think electricity twice a day is enough, and water charges vary from place to place. I want to eat some meat or something today, and my daily expenses 10 yuan are not enough. Do you still provide disposable chopsticks? Packing box? These are all costs. Besides, do you have to pay taxes or something?

Our family opened a small restaurant, mainly selling noodles and jiaozi. A bowl of noodles costs five yuan, making thirty or forty cents. Besides, the price is so expensive now.