=iferror(sum(--($a$4=right($f$2:$f$17,3))*(b4=(indirect(address(1,match(b4,$g$1:$h$1)+6))))*(indirect(mid(address(1,match(b4,$g$1:$h$1)+6),1,3)&2&":"&mid(address(1,match(b4,$g$1:$h$1)+6),1,3)&17))),"")
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