Situation: I have a workbook with over 30 worksheets, the worksheets have
data entry areas which are unblocked (our data entry person puts the data in
those areas) and also formula areas which are blocked, I protect each
worksheet individualy to save the formulas from being altered accidently by
data entry person.
Every month I need to unprotect all 30 worksheets and adjust the formulas
for the new month and then protect all 30 worksheets again to make them ready
for data entry person again.

Question:Is there any way to protect all 30 worksheets in one step instead
of 30
times, and unprotect them all 30 in one step instead of 30 times?

IREAD ONLY does not solve the problem, because it does not allow the data
entry person to work on the same file.