Questions Creating Pie Charts in Acumatica Report Writer

Hi, We have a customer that want to have a pie chart of sales by Item Class. Creating such a report is easy enough. However, getting the data represented on the report as a pie chart is proving a pit frustrating. In the report there is a group based upon the ItemClassCD. I have sub totals for each item class for sales and cost of sales. The report is basically a copy of the Sales Profitability by Item Class and Item.

My question is how can I setup a pie chart that has a data point dynamically set for each item class that appears on the report. It seems it must be possible.