Realtime token usage

I have a table which 3 users need to edit in realtime. The process used to be a google sheet.
we have about 20 columns, and roughly 10 of them needs 2-5 updates per row, across 1500 rows a day.
My question is this. When we update a single cell, and send it from 1 user to 2 others, does the entire row, including all the columns, count as a realtime message, or is it just the one cell that was updated, which is being counted?
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