Calculated Field Computes in Print Preview, but Returns Blank Results in Excel Export

I have created a calculated field that computes correctly when I run a print preview of my report, but when I try to export to excel, that column is always blank (besides the header).  All of my fields are right aligned, formatted identically, etc., so I am stuck as to what the problem might be.  I have tried formatting the number a few different ways and still can't get it to export.

Any ideas are appreciated!  Thank you!