Challenge No. 3: Extract all possible combinations of ID and result in the right-side table.
Solved using:Excel (BYROW, COUNTA, DROP), Power Query (List.Transform), Python, and Python in Excel.
By Creator
This is determine the challenge creator
Custom Grouping! Part 1
Challenge No. 2: Group the rows from the top, which in each group the total cost be lower than 130$.
Solved using:Excel (HSTACK, IF, LAMBDA), and Power Query (Table.Group).
Table Transformation! Part 1
Challenge No. 1: On various dates, the cumulative sales values (from the beginning of the year) for different products are presented (in the Question table).
Solved using:Excel (DROP, FILTER, HSTACK), and Power Query (Table.AddColumn, Table.TransformColumnTypes).