code cleaning

Hello?

Please review https://abc3088.sg-host.com/product/chicago/?productid=6836&city_code=NYCA&code=CHICAGO
Please go ahead and checkout(sandbox now).
We are taking too much time and reloading the cart and checkout.
I want to clear it.
It has a code for cart total which include tax and other plug-in fee function which I do not use more.
I want it no reload the browser.
codes are mixed in functions, cart, footer

Thanks