Checkout and Continue Shopping Buttons Do Not Work

Hello All,

I am having some technical difficulties with the Checkout and Continue Shopping Buttons. I have extensively read other threads in which users have had these issues; however, those solutions do not seem to work; which is why I am now turning to the gurus. The Checkout nor the Continue Shopping Button redirect anywhere. The stay on the same page. The Update Cart button does work, and the Clear Button works; however, it redirects you to Continue Shopping Button, which, as stated above, does not work. I deleted the checkout.php file and went through the Checkout Wizard option, which created all .php files associated successfully. However, when I upload them, and try them out, they still do not work. I am beyond my comprehension of WEBASSIST, at this point. I have attached a .zip files.

Lastly, I have inherited this webpage from my predecessor, so I apologize if it is cumbersome.