Hi
I have this book with about 300-odd sheets in it. It's a payment book - I have a language school and each student has a payment sheet in this book.
One of my staff found that on all the sheets from A to J the number '4000' had appeared (that's 4000yen). I don't know why this happened and I'd like to know if I can prevent this strangeness from happening again.
Thanks for any help.
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