Getting row count on pagination.

Hey! I’m new here and I might ask a silly question, but could not find it anywhere.
I’m trying to get number of rows currently exist on my grid (it uses pagination + filtering).
Each page contains 500 records. When I’m trying to use getRowsNum() it only returns size of rows on current page (500) and ignores another page. Also, before adding rows, I’m doing some math depends on column values so I need to have all of them before adding, while it shows columns on current page, again.

Any thoughts?

Unfortunately the mentioned problem cannot be reproduced locally.
The following sample works well for me locally: … nload.html
If the problem still occurs for you please, provide with a complete demo, or share with a demo link, where the problem can be reconstructed locally.