Restyle and Make Existing Very Simple 1 Product Magento Pages Responsive from PSD

I need this work to be done by the END OF THE WEEK. If you can't finish in a few days DO NOT BID. I have a Magento theme which needs to be restyled to match a PSD. The changes are mostly HTML/CSS, but you need to be proficient in Magento. Work has already been started for the transition. The store only has 1 product, with four different sizes (which display as different products), it is a very small store. I need the "My Account" pages, the "Shopping Cart" and the "Checkout" pages restyled and made responsive based of off PSD. Also a few changes may be needed on the "Product Listing" and the "Store Home" Message me for more details and with questions.