Generally speaking, large classes should be 1 hour 30 yuan, and the number of large classes should be above 10.

The landlord is a single teacher, charging 70 to 100 yuan for at least two hours.

Teaching for 10 days will cost 700 to 1000 yuan.

Now this price is not much at all,

What's more, it is one-on-one teaching, and 400 yuan is really a little too little.

We have a big class in 900 yuan, 15 class, one class 1 hour. Do the math.

That is 1 hour 60 yuan. One-on-one teaching can't be that cheap.