Anyone who wants to work in one of Microsoft’s new retail stores had better be in pretty good physical shape or start pumping iron now.The job description for sales associates says:Lifting/carrying 75 pounds (loading and unloading all those great products and carrying purchases out for our customers will be required!)A Microsoft employee in the U.K. first noticed this requirement, and then TechFlash dug further and found that store managers need only be able to lift 50 pounds. Retail technical advisors also