Factor vs Offest

[traquau]

Hi
I set up Test product with price 100
Add attribute with price +10 , factor 1 , offset 0.2
So the total price in front end is 190 ( 100 +90 )

In case 2 , I change factor to 0.8, offset null ( 0) , the total price is the same 190 .
I don't understand why we need offset ? Could you give me some hint?

[kobra]

You did not try what I explained

attribute > no price > want to sell by the case of 12 > factor = 12 > no offset

View the product from the front end

Now set offset to 2 and view then offset to -1 and view