How to change variant factor for a condition type in PO

I am having two different Purchase orders having all the fields same except plant.

• Case 1: Variant VA00 for plant MKOY is having variant factor as 1,00000

• Case 2: Variant VA00 for plant MKOX is having variant factor as 225,00000

Here the issue is that for one PO amount is capturing as 0,08 and for the other amount is fetching as 18,00.

as we can see in Case 1 variant factor is 1 hence 0,08*1=0,08 whereas for Case 2 variant factor is 225 hence 0,08*225=18.

Please let me know from where does the variant factor fetched in a variant and how we can change it.

On what fields it is dependent on?