The one thing that stops it working

Spot the moment a budget quietly stops updating itself, and put it back.

There is a quick way to tell which is which. Press a box and look at the wide bar along the top. If it shows something beginning with an equals sign, that box is doing a job — leave it be. If it shows a plain number, it is only a number.

Key points

What to remember

Try this

Find any total in a spreadsheet you already keep and press the box it sits in. Read the wide bar along the top. A plain number there means that total stopped being true the last time anything above it changed — and pressing Add up again puts it right.

Practice: The one thing that stops it working. Your first lesson is free, with no account or card; the rest are part of a Lantern plan. Interactive lessons require JavaScript.

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