Woocommerce – Display variation price in the add to cart button

I am trying to add the variation price in the add to card button in a wordpress website with woocommerce.
I tried this solution but:

• when a variation is selected it returns the price 2 times
• if selecting an other variation, it doesn’t change the price, but add a new one behind it
• it doesn’t remove the price when the selection is cleared.

Any idea of how to make it work?

I am expecting:

• The price to display in the button when a variation is selected
• The price to change when there is a change in the variation selection
• The price to disapear when clearing the selection