I have two tables, Job table and Item table. I have created a function where I'm trying to return a sum value of customer price for each individual job. Instead it returns a total sum of all jobs combined. The following is my function that I have created:

```
CREATE FUNCTION dbo.ApprvStatTotal(@JobNumber nvarchar(255)) 
RETURNS int  
AS  
BEGIN    
    DECLARE @ int    

    SELECT @ = Sum(CustmPrice)
    FROM dbo.Job 
    INNER JOIN dbo.Item ON dbo.Job.JobNumber = dbo.Item.JobNumber
    WHERE dbo.Job.JobNumber = dbo.Item.JobNumber 
      AND CustmApprvStat = 'Closed' 
       OR CustmApprvStat = 'Approved'

    RETURN @
End

```

I would like to get a total sum of of customer price of each individual job instead of overall total of all jobs, if that makes sense. If someone could help me with this, I would greatly appreciate it. Thanks