Quantity based discount on product page

[Leap-IT]

Hi all I have looked for a solution but can't find anything.

 

 

I have a product with two discounts based on quantity.

 

Example:

 

 

From 1 product 30% discount

 

From 3 products 50% discount

 

 

In the product page when I click on the plus button (increase quantity) the price will change according to the discount.

 

 

However the discount initially 30% will stay the same (does not update to 50% when i have quantity of 3)

 

 

How this could be achieved.

 

 

But the way when i go to my basket and changed the quantity there it works fine.

 

 

Thanks to all