Best-Selling Product Analysis

I have a complete dump of our sales and customer records and I need a clear, data-driven picture of which products and services actually drive revenue. Your task is to take that raw information, clean and consolidate it, then surface an undeniable ranking of our best-sellers... (Budget: $250 - $750 USD, Jobs: Data Analysis, Data Management, Data Mining, Data Visualization, Power BI, Python, Software Architecture, Statistical Analysis)