You can set the worksheet protection to disabling the selection of locked or unlocked cells - or both. This can all be implemented via Cells|Format on the Ribbon's Home tab. What they can't select, they can't copy. Of course, that doesn't prevent printing the file or saving it to a PDF whence the content can be copied...

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Unfortunately, there is information / numbers that are needed to be entered in each cell. The formulae were put into each cell through data validation. I have realised that it may be prudent to block / prevent pasting without macros.