Three messy exports in. One clean monthly report out.
Online orders, café sales and wholesale invoices are cleaned, modelled and sent as an Excel report and an email, on the 2nd of every month.

The problem
Brisa Coffee Roasters (a fictional company) sells online, in two cafés and to hotels. Every month someone spent a day pasting three different exports into one report. Dates came as text, money came as "$1,234" text, totals and duplicates hid in the rows, and column names changed from one export to the next.
What I built
Picks up the exports
On the 2nd of each month the system finds the files in a folder or Drive, whatever they are called.
Recognises each file
It works out which export is which, even when a column has been renamed.
Fixes the mess and counts every fix
Text dates, text money, subtotal rows, duplicates, refunds and product-name variants are corrected, and each fix is counted and listed.
Rebuilds a clean model
Clean tables with live formulas, so a number can be traced to its source rows.
Builds the Excel report
One page with the key numbers, native charts, the top products and highlights. A warning shows only if a source is missing.
Emails it, files it, alerts on failure
The report is emailed and saved to Drive. If something fails, it retries three times, then sends an alert.
Results
- 10,223data fixes counted in one runEach one listed in a Data quality sheet
- 36messy export files read12 months, 3 sources
- 1clean Excel report, ready to sendNative charts and live formulas
- 3retries before an alert is sentNothing fails silently
Fictional company and data. Every figure is the real output of the system on sample files.
See it working
The finished Excel report: key numbers, native charts and live formulas over a clean model.
Every fix is counted and listed, so the numbers can be trusted.
The summary email that arrives on the 2nd of each month, with the workbook attached.
The real n8n workflow: schedule, read, clean, model, deliver. Failures retry, then alert.
Built with
- n8n
- Excel
- Shopify
- Gmail
- Google Drive
Watch the 2-minute video
Video coming soon.
Download the sample report
This is the real workbook the system produced from the sample files. Open it in Excel and click around: the charts and formulas are live.
Download the sample reportExcel file, fictional data · 2.8 MB
Want this for your business?
Tell me what is slowing you down. I will reply within one business day with a clear idea of what I would build, and a fixed price after a short call.