Add content rule based on the form field value input data in Plone?
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I create a form using PloneFormGen.eg.
Product code: Gear-12
Value       : 2000

Based on the input value i.e if Value is >5000 , move the saved data content entry to folder 1 else move the entry to folder 2.

How can the TALES expression be used to trigger this kind of content rule? 
I am using Plone ver 4.1