Display number of RS found after filtering AND number of RS in one Rollup

We have over 1300 RS and more than 30 Roll-ups.

First it would be good to know, when I filter for RS (let's say by order number) how many RS were found

Second, it would be helpfull to see how many RS are in the selected Roll-up in order to check if all filtered RS are allready added to the Roll-up