Syntax: @CSUM(argumentlist, C)
argumentlist = any combination of cells or ranges
C = a constraint expression
@CSUM returns the sum of its arguments which satisfy the constraint C. Blank cells and cells containing strings are not counted.
Examples:
@CSUM(L1..L3, #<5) = 1.32, where L1 = 1.32, L2 = 5.45, and L3 = 8.32
@CSUM(C5..C10, #>=D1/D10) = 150, where C1..C10 are 10, 20, 30, 40, 50, and D1 = 100 and D10 = 10