A family of Microsoft word processing software products for creating web, email, and print documents.
The 'calculate on exit' property should be set on the input fields, not on the calculating fields. Additionally, using formfields to do the calculations is buggy; better to use formula fields for that.
To see how to do a wide range of calculations in Word using formula fields, check out my Microsoft Word Field Maths Tutorial, at:
http://windowssecrets.com/forums/showthread.php/154369-Microsoft-Word-Field-Maths-Tutorial
or