tRY:
Code:
--------------------
=SUM(IF(ISNUMBER(LEFT(G8:G278,LEN(G8:G278)-1)+0),IF((MOD(ROW(G8:G278)-ROW(G8),30)=0)*(LEFT(G8:G278,LEN(G8:G278)-1)+0),LEFT(G8:G278,LEN(G8:G278)-1)+0)))
--------------------
Confirmed with CTRL+SHIFT+ENTER not just ENTER
--
NBVC
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