Carbon Calculator design - Bonus if completed in 5 days

I need a carbon calculator built. Please refer to the these sites for examples - [login to view URL] [login to view URL] I need this as soon as possible, and will give a bonus if completed in 5 days. You must have built a carbon calculator before, and show proof, otherwise please do not apply. We require someone who is quick and experienced. Thanks If the job is done well, we will be looking at a hiring on an ongoing contract as we will be supplying our clients with this calculator as a whitelabel solution.