According to the question network, we can know the calculation method of Ctrip's step commission: according to the different stages of sales, different commission ratios are given, for example, the commission ratio is 5% for the part with sales below 11,111 yuan; For the part with sales between 11,111 yuan and 31,111 yuan, the commission ratio is 8%, so that the commission of sales staff will gradually increase with the increase of sales, thus encouraging sales staff to work harder and strive for higher sales. Ladder commission is a common calculation method of sales commission, which gives different commission ratios according to different stages of sales, in order to motivate sales staff to work harder and improve sales performance.