My company has a fleet of vehicles and printers and other things like that. What I want to do is make something that allows me to swap around these items so that they all end up with equal usage. I like to have all the same items with all the same years of manufacture for certain functions. That way I know the problems that occur with that model and do not have to learn about how to fix twenty different makes & models of cars and printers and keep parts for all on hand. So, I want to develop a spreadsheet that I can record mileage for each vehicle and the page count for each printer, at regular intervals move the printer or vehicle around so at the end of 5 years I have all my vehicles being equally used and can replace them all at once. Excel, I know enough about excel but little about high end math. Does anyone have an idea about where to start?