10. Showing a Net Difference

This Merged chart combines 3 separate charts to show a net difference.

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The first chart is an estimate of the time needed for development compared to the actual time spent on a month by month basis. The second chart shows the net position by month of the difference between estimated time and actual time and a third chart which shows a total as a grand sum of the estimate and the actual time. By combining the 3 charts together, we’re basically creating a sub total as we look at each month and then showing the grand total at the end.