Table of contents don't have the ability to add page ranges.

So the contents look like this:

Section A . . . . . . . 1

Section B . . . . . . . 5

Section C . . . . . . . 9

When they should look like this:

Section A . . . . . . . 1-4

Section B . . . . . . . 5-8

Section C . . . . . . . 9

All this needs to be implemented is to have the second number be one page less than the following number.

This would cover most situations and would be auto updating.