Set custom traffic volume product

this products allow your customers to choose their own traffic volume
First of all, the bandwidth in the settings of products with custom traffic volume must be left blank (bandwidth is a translation error, it should actually be traffic)
Create a configurable option group and select the products that need to use this configuration
configurable option group
Create a configurable option as shown below, set minimum and maximum values, set ladder, set price for each time period
configurable option
in the red box must be filled in as shown in the picture, that is, “traffic|”