Ignited by WOW2024-W15 my new mini-series focuses on table calculations in Tableau. Part 1 delves into the intricacies of table calculations going from bascis to advanced. Data densification is and its relation to table calcs is explored in Part 2. The seriess concludes with a practical application of the learnings at the example of WOW2024-Week 15 challenge in Part 3. Various aspects of table calculations, including addressing, partitioning and especially the infamous at the level settings as well as nested calculations, are examined in detail, providing a comprehensive understanding of advanced settings and applications.