Question : mail merge screws up calculation when printing

I have a Word 2007 document that selects data from Excel 2007. The data shows up fine when viewing the document in word and scrolling through; however when I finalize the merge to print it shows the wrong numbers in the fields.

Answer : mail merge screws up calculation when printing

The difference is that the one in error uses 12 instead of 12.73.    Could this be a rounding or cell value error?