where the package is call calc and the function is called pricecp...

SQL> variable x number;
SQL> begin
2 :x := calc.pricecp (23, 'LCL', '1-apr-98', '1-apr-99');
3 end;
4 .
SQL> /

PL/SQL procedure successfully completed.

SQL> print x

X
----------
-4.4776119

¶ 8:04 pm