Add total to cart/checkout page

Author: w3bdesign

README.md

@@ -79,7 +79,7 @@ With that said, keep the following in mind:
 
 ## TODO
 
-- Look into replacing nextConfig.js with https://vercel.com/docs/build-step#environment-variables
+- Add total to cart/checkout page
 - Copy billing address to shipping address
 - Display product variation name in cart / checkout
 - Hide products not in stock