Lets say that I have a Sales Forecast list with Customer Name and Sales Status columns. The number of registries in this list changes every day (some new sales opportunities are created and some are deleted).

Questions are:

1) How can I create a report to compare two days in order to know which registries have been added and/or deleted?

2) If I want to know if a Sales Status have changed from one day to another, what is the best way to do it?

Tks!!!