The error message you are
seeing is telling you that for the numbers that you entered, there was nothing left over for personal
miles. The business miles +
commuting miles was greater than the total.
So, the program assumes that the error is in the number of commuting
miles.
Revisit the section where
the miles was entered to be sure all of your numbers are accurate, but remember
the total must be greater than business + commuting.
The assumption is
that: total number of miles driven - business miles - commuting miles =
personal miles.