Custom Secure Shopping Cart SQL -- 3

The Website is [login to view URL] Session based secure shopping cart. Add to cart, auto update cart on page without refresh. Multiple items in cart e.g. ( Item x 5 ) able to decrease and increase without page refresh. Update total without refreshing page, add delivery charge. Spend minimum of £10 for delivery, once cart reaches £10 hide the notification. Cash on delivery or Bitcoin Payment. Integrate Coinbase API [login to view URL] User should be able to checkout the secure cart, pay for the order and order details should be e-mailed to webmaster. My budget is around $100 please keep that in mind.