Make a couple of Shopping Cart pages

I need 1) a price calculator that coordinates with a "Add to Cart" button that links up with 2) a shopping cart page that shows the price, item/service, deletion option, coupon validation and other 3) a payment page that has custom fields with different kinds of inputs including text fields, radio buttons, dropdown selections, upload files option, which links up with 4) a Paypal button and a Moneybookers button that takes the customer to the respective pages. This is an example of the sort of shopping cart I need: http:// mr proofread (dot) com Remove the white spaces above If you make a shopping cart exactly as in the above example, with a few minor customization changes, I will be happy. I have a joomla site 2.5 and I already have a price calculator but the price calculator may need some tweaking. You will have to help me with the price calculator too, making some adjustments. Am willing to pay $150 for this job. Don't bid if your bid is much higher than this. I only want experienced programmers to apply, and they should have made this kind of shopping cart before. This work should be completed in less than 24 hours. Payment is given at the end only after the job has been completed and is satisfactory in every respect. Every part of the shopping cart and payment pages should work. If any part does not work, no payment will be given.