The Friday night I realized, "I can't even read my own IF formulas anymore." Let me start with the conclusion: if you are using nested IF functions to categorize sales data into ranks like S, A, B, or ...

Practiced: • SUM, COUNT, AVERAGE analysis • Product-wise & city-wise sales analysis • Revenue contribution analysis • Date grouping (Months, Quarters, Years) • Filtering, sorting, cross-tab reports • ...