The Math Formula Multi Column node is an extension of the Math Formula node which evaluates a mathematical expression based on the values in a row for a set of selected columns. It allows the user to do with a single node what would otherwise require multiple nodes. The workflow iterates over all numeric columns and negates the values in the column.
The cells in the new column are typed collections of cells.
Multiply the two columns using the expression Col1Col2 and Append a new column. Groups the selected columns per row and aggregates their cells using the selected aggregation method. Use COL_SUM on the new column. On each one of the 4 groups defined by sex and income values calculate total number of rows and average age and write results to a CSV file.