This document discusses MapSherpa's process for aggregating and standardizing financial transactions from multiple marketplaces into a single database. MapSherpa sells print maps through various channels, including their own platform, Amazon, and MapTrove. They needed a way to collect sales data from these disparate sources and calculate additional costs like printing, shipping, and royalties in a standardized format. The solution involves using FME to extract and transform data from CouchDB, CSV files, Amazon MWS API, and Google Sheets into normalized tables in PostgreSQL. Reports are then generated from these tables in Google Data Studio for accounting and business decisions.