Start a spreadsheet using your favorite spreadsheet program, and enter the numbers there.
I've been using an Excel spreadsheet since 1997, with columns formatted to look like a paper logbook, and a summary tab that lets me check currency and other numbers needed for insurance renewal.
If you did it in Google Sheets, you could store it online and edit from any internet-connected device.
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Rob Prior
1996 RV-6 "Tweety" C-FRBP (formerly N196RV)
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