Quantity Totals From Cells

I'm trying to gather a sum from a group of cells based on certain criteria. In the example if the data matches in column K found in column C, I want column L to sum each data point.

For instance I would want "L2" to equal 3, "L3" = 4, "L3"= 2, & "L4"=1.

Thanks in advance!

That was the solution- thanks!

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