Profit Markup Wheel Calculator. Every Salesperson will love this imprinted profit margin wheel calculator which allows for rapid calculations. Digitally printed in high resolution 4 colour process & UV Varnish directly on to the .020 White Vinyl Plastic material. This makes for a top quality, long lasting wheel. Use our standard template or supply your own customized one. Top wheel 4.5" dia. & Bottom wheel - 6" dia. Separately priced options - Back Imprint in Black or in Full Colour.