Magento Product Data Entry Needed

The magento site is already setup, the product categories already created. We need someone to either manually enter in roughly 600 products into our magento database and associate it to the proper category including product image, price, quantity, cost, description, weight, and SKU number. You also have the option to import the data, it is currently in an excel sheet but not in the format to automatically import into magento, if you know how to manipulate the data in such a way to automatically import the data then great more time saved. The product images are named after the product SKU number and will be required to be loaded in as well. This isn't a very technically challenging job we need someone who is fast at data entry and can get this done ASAP, we also need someone who already knows how magento works we can't waste time teaching you how to input products. Accuracy is very important, we will be checking your work before we release the payment to you.