Summing Numbers When Certain Criteria Are Met

I would need to get this next thing working:



H I J K L M N O P
Type No. No.Points Points/RN Points/KR Points/KV Points/ER R/V Total
5 KV 12 4 2 3 4 6 0 8
6 RN 90 18 3 4 5 8 0 26
7 KV 12 4 4 4 5 6 10 13
8 ER
9 KV
10 KR
...and so on, with the following logic

If Type = KV, then P$ = sum(J$,M$,O$), but if it is something else, like RN, then it needs to sum J$,K$,O$

I've tried using the following:



=IF(ISNUMBER(SEARCH("KV";H2));SUM(J2+M2+O2);0;IF(ISNUMBER(SEARCH("ER";H2));SUM(J2+N2+O2));
but only the two first ifs work, which is kind of logical, since the second if is the "value if false" statement. Is there any way to get this to work?