created chart with 1 series on excel 2013, would like to add 2nd series as Power watts series to chart , when I go to selection and try to pick 2ns series, its grey out,.
have attached the file, can some one please help, I just installed 2013 excel, new to this , I was using excel 2010, 2013 has totally new screen , getting used to these option
thanks in advance
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