[Skunkworks] POS solution

Hi Skunkers, Am looking for a POS solution for a retail/wholesale shop which is non expensive. Some of the specifications include: -Open source software -2D/3D barcode reader. -Ability to offer discounts -stock levels(inventory) -easy to learn and intergrate -ability to calculate gross profit on the fly. For further specs. and further discussions contact me on my mail. Thanks. Mark -- " The Paradox of Choice-Why More Is Less"