Woocommerce Addon

I am looking to have a woo commerce plug-in developed that tells the customer the amount they are saving when viewing the cart and checkout pages. This amount must be shown per line item as well as the total savings in below or above the total. This amount will obviously be the difference between the regular price and the sale price you set in the backend of every woocommerce product. Have attached a screenshot to illustrate this better. This must be a standalone plug-in that will work with any woo commerce ready theme. Please give time for completion Thanks