Thank you for the quick reply. I believe both variables are numeric. When I used the proc contents; function it showed me: I am trying to create a new variable that combines the total value in each row for FA7D and MB11D. Everything resource I have found has told me to use the newvariable=sum(var1, var2) command. However, when I perform it, it doesn't sum the values. It shows the new variable value as missing instead of being summed. Thanks again,
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