Alter some Images

I have several product images that need to be converted for sales on Amazon. They need to have a white background and meet certain specifications that can be found below: Image Standards Images must accurately represent the product and show only the product that's for sale, with minimal or no propping. MAIN images must have a pure white background (pure white blends in with the Amazon search and item detail pages - RGB values of 255, 255, 255). MAIN images must show the actual product (not a graphic or illustration), and must NOT show excluded accessories, props that may confuse the customer, text that is not part of the product, or logos/watermarks/inset images. The product must fill 85% or more of the image. Images should be 1000 pixels or larger in either height or width, as this will enable zoom function on the website (zoom has proven to enhance sales). The smallest your file should be is 500 pixels on the longest side. Amazon accepts JPEG (.jpg), TIFF (.tif), or GIF (.gif) file formats. JPEG is preferred.