How to group data with matching categories?

[Anonymous]

Hi,

I'm new to PowerBI and I'm experiencing a problem when I am doing my report.

1. In my data, I have "customer" column(description) and "sales" column(number),  I would like to make a group of some certain customers with their matching sales. Tried many ways but does not work. 

2. After making a group of customers, I would like to calculate their percentage of all cutomers sales. 

Could someone help me with my questions, please?

Thank you!

[valeriemcbain]

https://docs.microsoft.com/en-us/power-bi/create-reports/desktop-grouping-and-binning

[Anonymous]

Could anyone help me with this problem please?