suppose I have this record
empcode net year month 602256 3479.97 2014 1 602256 33125.98 2014 1 602256 5247.11 2014 2 602256 7698.39 2014 2 602256 2941.46 2013 3 602256 5515.57 2014 3 602256 5758.68 2014 3 602256 4966.89 2013 4 602256 4984.06 2013 4 602256 5951.63 2014 4 602256 19861.04 2014 4
what i want to happen is that i want to sum the net with the same year and month hope you can help me thank you in advance.