Spreadsheet (duh) with 3 columns:
Month, Vehicle Licence #, Odometer readings.

Now looking at the Month and Vehicle Licence #, what is the lowest odometer
reading and also what is the highest odometer reading, so as to calculate the
distance travelled.

Do not want to use Pivot tables - as columns will grow.
Do not want to use array formula as end user is as useless as putting butter
on bread with a toothpick.

Thanks in advance.