What they will be checking on a ramp check will be your fuel calculations. I'm sure we all do them and write them down in our fuel log - starting with ground speed along track made good (distance along track, time), actual consumption (fuel used, time), time to destination (ground speed made good, distance to go, corrected for wind changes, etc), fuel required to destination (time, consumption plus variable reserve), fuel remaining (net of fixed reserve). And update regularly, and to 5 decimal places!
Remember maintaining a fuel log is on the ramp check checklist ...