Hi, i have a table in which counts the hours that are in a period that i
define, i had a precious help, that have gived me this formula:

=MAX(MIN(MOD(B1,1),$N$1)-MAX(MOD(A1,1),$M$1),0)
A B C D M N
1 18:00 21:00 Ponta 1:00 20:00 0:00
2 21:00 0:00 Cheias 3:00

And it works, except if i put 0:00 in N column, final term. The problem is
that in column D2 it doesn't appear 3:00 it appears 0:00, because he can't
recognize 0:00 as 24:00, ando so returns 0:00. The format is h:mm.

Anyone knows how to solve this problem?
tks