I have been given a data set which contains work hours and dates in the form
of mm/dd/yy. I am trying to sum all the hours worked in each month. A
co-worker suggested I use sumproduct but I'm still not able to achieve the
process. Additionally, the data crosses over years, so I am not quite sure
how to create a fomula that takes the year into account. Any help would be
great. Thanks much.

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Zachary Baker