Can this be done in SQL? Query to Group by Value

I have a MSSQL View that outputs this:
        INVNUMBER              ITEM                     DATE        COMPANY   QTYSHIPPED INVFISYR
      INV73267                    500LAPACK              20020701        COMP1    1                2002
      INV73354                    KASU70                    20020703   COMP1    1                2002
      INV73356                    CAADLT2VM              20020703        COMP2    1                2002
      INV73356                    KASU70                    20020703   COMP2    1                2002
      INV73357                    KASU408                  20020703   COMP2    1                2002
      INV73362                    KASU70                    20020703   COMP2    1                     2002
      INV73363                    CAADLT2VM              20020703        COMP3    1                2002
      INV73366                    KASU408                  20020703   COMP4    1                2002

And this query (is actually stored procedure):

SELECT SUM(QTYSHIPPED), ITEM from [system-specific-product]
WHERE INVDATE > @StartDte AND INVDATE < @EndDte
GROUP BY ITEM

Which gives me a listing.

What I am after is to group certain items into groups...

So, the KASU70 and KASU408 are to be grouped together and totaled, however for every KASU70, it counts as 5..

I imagined a long case statement specifying each item in its area, or maybe a nested SELECT. But I would be happy for a stored procedure using User Definable functions if necessary.

I currently get:

Column1      ITEM
1.0000      OAS100SPVMBP
2.0000      KASU70
5.0000      OAS12PSTN
4.0000      KASU408

but would like this:

Totals        ITEM
1.0000      OAS100SPVMBP
6.0000      KASU_TTL
5.0000      OAS12PSTN

Thanks for looking.