New Aggregation Type setting available for columns:

This feature aggregates field values in Summary Rows. It applies to fields of type Number and Currency, and supports the following aggregation types:
▪Sum – Adds up all values in the field.
▪Max – Displays the highest value.
▪Min – Displays the lowest value.
▪Avg – Calculates the average of all values.
These aggregations help provide quick insights into numerical data across grouped or summarised records.
By default, the Sum aggregation is applied to Currency columns and the Actual Hours column.

Summary tasks values in aggregated fields will be displayed in parentheses. The aggregation will include the summary task value and the values of its child tasks:

The rules above do not apply by default to aggregation type Avg.