The form in post #10 doesn't include a Dropdown with a bookmark named Dropdown1, or one with either an "HR" or "001" option, so it's difficult to know exactly what you're doing. That said, the calculation field you refer to would be expressed as:
{IF{REF Dropdown1}= "HR" {REF UXOQTY1}}
as there is no multiplication required.

PS: I note that, despite my advice against it, your form contains both content controls and formfields.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]