buttons and checkout

I need someone who can create 2 "Add to Cart" and 2 "View Cart" buttons with checkout using the LATEST PayPal JavaScript SDK's and NVP/SOAP API's for my custom built website. I am not looking for any additional features like discount codes, gift options, or express checkout, as these are not needed. All that is needed is a simple, streamlined, and secure system that will allow me to process orders, add sales tax and shipping, for customers that are checking-out using either a PayPal account or a credit card.