In order to group fields inside a view you can use the register function. In the view, you can create a new field using the function register and adding all the fields that you need to group. You could name the field as sales. Then you will have a register with all the fields related to sales.
To know more about how to use register function please read the following documentation **Advanced VQL Guide** under the section “**DEFINING A DATA TYPE.**”
Hope this helps.