Series in a Bar chart
 

Hi

I have a bar chart which contains 3 lots of data. There is the name of the
product on the x axis, the number of products available in the y axis, and I
want the legend on the bar graph to show the oldest date of the products
available. I have looked a the series formula but cannot get it to show the
oldest date of the product. I can make it show the number of products, or
show both the number of products and the oldest date, but not just the oldest
date. Does anyone know how to do this please?
--
Naina