I have written the following IF statement to count how much time is used
during a 1 hour time band, where f6 is actual start time, g6 is actual stop
time, l6 is start of time band, and m6 is end of time band:

=if(f6=l6,if(f6<m6,if(g6<=m6,g6-f6,m6-f6,0),if(f6<m6,if(g6l6,if(g6<=m6,g6-l6,m6-l6),0)))

Excel tells me that "I've entered too many arguments" when I enter this
formula, and so it won't calculate the time used in the time band. I've made
sure I typed the formula correctly. Is there a way to correct this?