Merge Excel files: combine monthly sales CSVs with source tracking
A real merge Excel files walkthrough using three public monthly sales CSVs, one Messy2Sheet prompt, a remote runner result, and an inline spreadsheet preview.
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Preview the merged monthly sales rows
The combined Q1 electronics sales CSV generated from three public monthly sales files, shown here so readers can inspect source tracking, cleaned order rows, parsed address fields, and calculated line totals before downloading.
Inline read-only preview
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