<div data-cart-add='atari_blade_runner'>
Click me!
</div>
<div data-cart-add='atari_black'>
Click me!
</div>
<div data-cart-add='atari_royal_blue'>
Click me!
</div>
//Adds new or Increases amount of 'atari_blade_runner'
//Works as a toggle
//Adds/removes '.k_button_already' class to the button
shop.cart.updateGood('atari_black', '+');
//Adds new or Increases amount of 'atari_black'
shop.cart.updateGood('atari_black', '-');
//Decreases amount or Deletes 'atari_black'