Production charts also show cumulative/storage

The current charts show the amount produced and amount consumed, but for long-term sustainability the biggest concern is the delta between these: the excess or deficit. It would be helpful to have an additional line on the chart that shows the net difference in a product, as well as a line that shows the average or end-of-period amount in storage. This way you can identify shortages and plan for expansion.

Darn, I was going to add an image to explain, but I see now that I can't do that after the fact.