A company has annual sales of $ 78 million, COGS of $ 61 million, Average inventory of $ 14 million, and salery of $ 55,000. A company year is 260 days. They are considering remodeling at a cost of $ 620,00. In addition new supply chain and hardware related software is priced at $ 480,000 which includes substantial employee training and debugging. What is the economic payback in years for this scenerio?