Cameron

This is actually called the Mirror Image Rule $-$ because acceptance has to be the "mirror image" of the offer and match in every way.

Iris

But all I did was change the price by one dollar! My brother said there would be tax benefits. And the settlement date is no big deal.

Pedro Heredia

The Mirror Image Rule applies:

To critical terms of the offer and acceptance, not to "minor" changes that don't affect the core of the agreement.

To all the terms of the offer and acceptance, regardless of whether it's a "major" change.