I have helped many small businesses/sole traders to sort out their Excel spreadsheets to analyse and chart sales data, as well as simplifying the preparation of accounts, and scanning bank statements to check figures are accurate.
This includes helping an accountant, tradesmen, artists, and a regular client of mine who was a property manager (I used to maintain a spreadsheet of Greater Manchester property data for him and regularly update it).
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I can also do accurate data entry from paper records, and proofreading.