moving add to cart button

Site URL: https://www.projecteightythree.com/

i have coded the izettle buy it now button on to my site but i would like the button to be place under the price of the item so you dont have to scroll to the bottom of the page to add an item to the cart?

Hi! How did you attach the izettle for the site? Would you have a instructions for it? a website or article maybe?

Thank you!