I'm trying to add up the amount of machinery downtime from a number of
different cells but the thing is that I need to only have it added up by the
date set in another cell (Which can have multiple cells of the same date) as
well as the specific name of that machinery in another cell(which can also
have multiples of the same machinery name). How can i get to just add up for
that specific date, machine name, and time.

Example:

Date (Cell 1A thru 50A) Machinery Name(Cell 1B thru 50B) Downtime(Cell 1J
thru 50J)

Please help
Thanks