Running calculations feature in Looker Studio | by Gaille Reports

I have 20 products and one customer purchased 20 different product. Want to show in dashboard about the customer purchased 20 product and next month he purchased 16 product. How can i show this data in dashboard. Which chat is suitable. And in pie chart we have only 20 slices.if we have 25 product how can we show that to analyse that report

Many thanks I found this really useful. Do you know what date formular you would use if you wanted to compare day on day in the table? Thanks

Thank you for the great video. One question: Can we use it on a pivot table?