How can I have multiple criteria counted in the same range? Specifically, I
am looking to count the total number of individuals who are working either 10
or 24 hours on a given day together in one cell. They are listed in coulmns
that correspond to the days of the month. I also have people working 8 and
13 hours and have cells for those totals. For that I use countif(A1:25, "8")
or similar for 13 but I cannot figure out how to add the 10 and 24's
together. Any help is appreciated.

Thanks