Send one recurring CSV layout of up to 100,000 rows and 30 columns, plus the definitions for two summaries you need each time. I will build a local browser tool that reads the file, checks the required columns, displays those summaries and exports the results. I will run it on an agreed example and include a one-page guide. Delivery is within one week after we agree on the fields and calculations. One revision to those calculations is included. Multiple layouts, live data connections or hosting receive a custom quote.