SUMPRODUCT formula Criteria fix

Hello, I am trying to get my SUMPRODUCT formula working properly. I would like the 'Total Project Hours' sheet, under the packing column to sum the total time for any tasks listed as 'Packing' and 'Crate making' (found in column L in the sheet named 'Data').

My formula so far is:

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But it is not working...

I have attached the workbook,thanks!

Perhaps
=SUM(SUMIF(Data!L3:L10000,{"Packing","Crate making"},Data!M3:M10000))

Originally Posted by Special-K

=SUMPRODUCT(((Data!L3:L10000="Packing")+(Data!L3:L10000="Crate making"))*(Data!M3:M10000))

=SUMPRODUCT(((Data!L3:L10000="Packing")+(Data!L3:L10000="Crate making"))*(Data!M3:M10000))

Thank you both so much guys!