Jiamusi Railway Bureau recruits train salesmen. How to pay them?

There is a railway hotel next to Jiamusi Railway Station, and the second floor is the training place. If you want to sell goods on the train, you need training. It usually takes two weeks, and then you can get on the bus and sell the goods. Basic salary, 800 yuan. All the goods sold are their own, but the goods must be purchased at the training place. Their price is 30% higher than that outside, so the things sold on the bus are so expensive. There are no regular employees (referring to sales staff) at present.