Active Report - Stacked Bar Chart

[bscherzer]

I'm making a stacked bar chart that displays products sold on the y-axis and I want a stacked bar chart where the cost of goods sold for the product and the sales amount for the product appear on the same bar for each product. If I choose both Cost of Goods Sold and Sales from my data source and drag them onto the Value for the chart, it only displays one of the 2 values on the bar chart instead of both. This seems like a very basic question, but how do I display 2 values on a single bar?