=sum()
=max()
=min()
=average()
=count() - number =counta() -text+number
=countif() -depend on condition IF (condition, True case, False case) -one condition
IF (condition, True case,IF (condition, True case, False case)) -more than one condition SUMIF()- depend on condition
LOOKUP
1. VLOOKUP - column(vertical)
2.HLOOKUP - row(horizontal)