Report an error, or ask a question, without an email address on the page

This site’s whole pitch is that a reader can check the arithmetic. If a number, a link, or a script doesn’t hold up, this is the fastest way to say where.

Write to checktheworksheet@gmail.com.

A subject line naming the page helps, for example the page title or its address. If the point is about a number, say which one and what you make it instead, and the reply will say either where the difference comes from or that you are right.

Allow 48 hours for a reply. There is one person behind this and no organisation.

Corrections get made whether or not they are convenient for the argument here. That is the whole basis on which anything on this site is worth reading.