Syntax: @COUNT(argumentlist)
argumentlist = any combination of numbers, cells, or ranges
@COUNT returns a count of its non-blank arguments. Cells that contain strings are counted.
Examples:
@COUNT(``Tom'', ``Bob'', ``Sue'', ``Mary'', ``Zack'', ``Ann'') = 6
@COUNT(D4..D8) = 3, where D4 is empty, D5 = 1, D6 is empty, D7 = 0, and D8 = 5
@COUNT(E5..J10) = 30, E5..J10 contains 36 cells, therefore 6 cells are blank