Updating Table with New Variable in SAS Sql

[Steelersgirl]

I am trying to update a table in SAS with a new variable. I want the salary column to be multiplied by different numbers depending on position. This is the code I have been using, but it giving me an error saying that modsal isn't a variable and also giving an error when I am trying to set the position to the number I am multiplying by saying there is a syntax error. 

PROC sql;
UPDATE work.baseball2
SET modsal = salary*case label ="Modern Salary Equivelent"
WHEN position = 'C' then 5
WHEN position = ('1B','2B','SS','3B') then 6
WHEN position =  ('RF','LF','CF','DH') then 8
END;

[novinosrin · Accepted solution]

this part definitely needs correction

to 

WHEN position = 'C' then 5
WHEN position in ('1B','2B','SS','3B') then 6
WHEN position in  ('RF','LF','CF','DH') then 8