Here is the situation [I'll be as brief as possible]:

A file shared on an intranet has 10 worksheets: 1 master and 9 more for
each of 9 sections. All the worksheets are identical.

We use the master sheet to buy supplies for the 9 sections.

It would save so much work if this was possible: An entry [always a number]
made in, say, cell E62 of worksheet 4 would change cell E62 of the master
sheet.

At the same time, we need to lock out users from, say, section 4 from making
changes in sheet 7.

How is this done?

Am sure there's a way, and this forum will have it.

Thanks in advance for all help. It will support our efforts in Afghanistan.