Hello Thakur,
There are several ways to do it. Here is some,
=SUM(INDEX($D9:$O13,0,MATCH(D17,$D8:$O8,0)))
=SUM(OFFSET($D9:$D13,,MATCH(D17,$D8:$O8,0)-1))
If there is already "Total" row, then you can use VLOOKUP & HLOOKUP
VLOOKUP: Lookup "Total" row & MATCH month column,
=VLOOKUP("Total",$C8:$O14,MATCH(D17,$C8:$O8,0),0)
HLOOKUP: Lookup Month & MATCH "Total" row,
=HLOOKUP(D17,$D8:$O14,MATCH("Total",$C8:$C14,0),0)