Count / Countif / Countifs: condition counting.
Note: count only on numerical statistics
sum / sumif / sumifs: Conditional Sum.
Average / Averageifs: return parameter average (arithmetic mean).
QUARTILE: quartile returns a set of data. Quartile commonly used for sales and survey data to group overall.
Substotal: summary type function, the average, count, maximum and minimum, multiplied by standard deviation, sum, variance, etc. and other parameters.
