File Converter
Import a CSV or Excel file, tell it which row the headers are on, build the output you want — reorder columns; convert dates, text and numbers; do simple maths; categorise with a lookup table; filter, sort, de-duplicate and total the rows — then export CSV or Excel. Save the whole setup as a named file type (its own columns, filters and rules) so next month's file of the same kind is two clicks — and rules for one file type never leak onto another.