Display Data Labels for only the First and Last Data Points

My graph looks like this:

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Basically, I want to get rid of the center labels for the red and blue lines (series). This is a dynamic graph and the value will vary by user input. Thus, I can't simply delete these labels and fix the problem. I need to set-up excel so that only the first and last values of the two series have labels. The end result would look like:

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Is this possible? A VBA solution would be great. Thank you.