Add your pay checks together for a year (lol) or you can estimate by the week or what your average hours are in a month. If you are paid salary then it is even easier. Adding the hours you worked for...
Kansas' statewide average wheat yield varies from year to year, of course, but from 2000 to 2009 it ranged from a low of 32 bu/ac to a high of 48 bu/ac.