I have an app where I record sales among other things. I would like to keep track of Year To Date totals for each customer. In my Sales Table in the YTD column under App Formula I have tried SUM(Sales[Total]) When I click Test it shows me the total o...

I have an app where I would like to record sales which I have already done. I would also like to have a record of year to date totals from each vendor. My record totals sales for each transaction. When I try to add the figures for a YTD total it does...