SQL & PL/SQL :: Getting Sum Of Value In Trigger?

CREATE TABLE TEST
(
EMPNO NUMBER,
SAL NUMBER
)
/
CREATE TABLE SUMSAL
(

[code].....

Say I have emp table. Now what I want is that whenever I enter new records in EMP table, I want to sum up the value inserted for SAL column and I want to do some task based on that value.

I'm inserting the EMPNO and SAL in test table whenever a row is inserted in EMP table. Now from there I want the SUM(SAL) column. As you can see I took the sum and inserted it into another table (or I can update a packaged variable with this value). It is inserting as many rows in SUMSAL table as many I insert in emp table through Oracle Forms. I want it to insert only one row in SUMSAL table because after user enters all the data for EMP table, I want to capture the sum of Salary inserted and then I want to perform some tasks based on that value.

SQL> select * from test
2 /
EMPNO SAL
---------- ----------
1111 100
2222 200
SQL> select * from sumsal

[code].....

-- Here it should be only one value. i.e: Sum(SAL) column. That is 300. But whatever task I want to perform it performs it for each row inserted. But I want to perform it after trigger inserts all the rows in TEST table.

I wrote an after insert trigger at table level but still I'm getting the same result.