=SUM(SUMIF('February 3, 2014'!$L$2:$L$58,D4,'February 3, 2014'!H2:H58)+(SUMIF('February 3, 2014'!$M$2:$M$58,D4,'February 3, 2014'!H2:H58)+(SUMIF('February 3, 2014'!$N$2:$N$58,D4,'February 3, 2014'!H2:H58))))
Is there an easier/neater formula than this?