Calculate Rating of only Goals section in Overall summary tab

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Dear All,

I am using Average method for rating calculation of Goals and Competency section. However for Overall summary I would want rating to be calculated on based on Goals section and not of competency. 

I tried defining weights with 100 for Goals and 0 for Competency. Still the final rating is getting calculated based on both the section is there any way to get this?

Thanks for your help