The recycled license market is readily accessible on eBay. There are other sites, too, but that's the one I use.
Excel is the granddaddy of all electronic spreadsheet programs. Of course it can be used to create and edit spreadsheets - it practically invented them.
Brian - Windows 10 Home, 64-Bit, Version 1809, Build 17763
A great deal of intelligence can be invested in ignorance when the need for illusion is deep.
~ Saul Bellow, To Jerusalem and Back