Try in D13:
=IF(SUMIF(INDIRECT(D$9&"!$C$12:$C$44"),$B13,INDIRECT(D$9&"!$d$12:$d$44"))>0,SUMIF(INDIRECT(D$9&"!$C$12:$C$44"),$B13,INDIRECT(D$9&"!$d$12:$d$44")),"")
Drag down and across.