Still no records loaded after trying the new version of the control file. From the presser_sales.ctl.log

Record 2: Discarded - failed all WHEN clauses.
Record 3: Discarded - failed all WHEN clauses.
Record 5: Discarded - failed all WHEN clauses.
Record 1: Rejected - Error on table STAGE.PRESSER_SALES, column PAYMENT_AMOUNT.
ORA-01722: invalid number
Record 4: Rejected - Error on table STAGE.PRESSER_SALES, column PAYMENT_AMOUNT.
ORA-01722: invalid number

...my new control file as suggested earlier...

-- Written by Craig Buchanan/ Tom!  12/03/10
Load DATA
INFILE '/xfers/oracle/dw/data/presser_sales.dat'
BADFILE '/xfers/oracle/dw/data/presser_sales.bad'
APPEND INTO TABLE STAGE.PRESSER_SALES
WHEN (ITEM_QTY != '-')
FIELDS TERMINATED BY ',' 
OPTIONALLY ENCLOSED BY '"' 
TRAILING NULLCOLS 
(ITEM_NUM     CHAR,
 TITLE        CHAR "TRIM(:TITLE)", 
 LIST_PRICE   CHAR "to_number(substr(:list_price,2))",
 ITEM_QTY     CHAR, 
 PAYMENT_AMOUNT CHAR "to_number(substr(:payment_amount,2))",
 INSERT_USER      CONSTANT "SYSTEM", 
 INSERT_USER_DATE    SYSDATE, 
 INSERT_STATUS_CODE    CONSTANT "I"
) 
...and again, the table I am attempting to load into...

CREATE TABLE presser_sales
    (presser_sales_id               NUMBER ,
    item_num                       VARCHAR2(20 BYTE),
    title                          VARCHAR2(200 BYTE),
    list_price                     NUMBER,
    item_qty                       NUMBER,
    payment_amount                 NUMBER,
    insert_user                    VARCHAR2(20 BYTE),
    insert_user_date               DATE,
    insert_status_code             CHAR(1 BYTE))
/

...and finally, the procedure I'm calling sqlldr from...

PROCEDURE PRESSER_SALES
   as
   c_program_name              VARCHAR2(100)    := 'STAGE.LOAD_PKG.PRESSER_SALES';
   str                         varchar2(1350);
   sbj                         varchar2(1350);

  BEGIN

     dw.log(C_PROGRAM_NAME,'*** Procedure Start ***');
     COMMIT;
     execute immediate '    DELETE FROM STAGE.PRESSER_SALES WHERE INSERT_STATUS_CODE = ''I''';
     COMMIT;

     DW.SQLLOADER('presser_sales.ctl','STAGE','PRESSER_SALES');
     FILE_PKG.SOURCE_FILE_MTH_BACKUP('presser_sales');

     dw.log(C_PROGRAM_NAME,'    File presser_sales.dat has been loaded into STAGE and backup has been performed.');

     execute immediate 'UPDATE STAGE.PRESSER_SALES SET INSERT_STATUS_CODE = ''C'' WHERE INSERT_STATUS_CODE = ''I''';
     COMMIT;

     dw.log(C_PROGRAM_NAME,'*** Procedure End ***');
     COMMIT;

  EXCEPTION
    WHEN OTHERS THEN

         dw.log(C_PROGRAM_NAME,'An error has occurred and processing has been terminated. Notification sent.');
         COMMIT;

       sbj := 'PRESSER_SALES stored procedure, LOAD_PKG package ERROR';
       dw.send_email('dwgroup@umpublishing.org','dwgroup@umpublishing.org',
                   sbj, sqlerrm);
       raise_application_error(-20001,'The following error has occured: ' || sqlerrm);
  END PRESSER_SALES;

I was tasked with doing this load solely using sqlldr. If I would have been allowed to use a temp table with all varchar2 fields, I would have been done within just a day or two. I just submitted the first 5 rows of my file as sample data earlier for the purpose of my question, but my real initail file had thousands of rows.

074851      ,KEYS OF KINGDOM (INTERLUDES)  ,$10.00, 1 , $5.00 
073448      ,"GOSPEL PIANIST, THE           ",$13.00, -   , $-   
088100      ,KEYS OF KINGDOM (COMMUNION))  ,$10.00, -   , $-   
018781      ,KEYS OF KINGDOM (CHRISTMAS)   ,$10.00, 3 , $15.00 
018773      ,KEYS OF KINGDOM (GENERAL)     ,$10.00, -   , $-   

This morning I sucessfully loaded my file, and while I am convinced that it isn't the cleanest way to write the load, I am very gratefull to finally get that fist pump moment.

-- Written by Craig Buchanan/ Tom!  12/03/10
Load DATA
INFILE '/xfers/oracle/dw/data/presser_sales.dat'
BADFILE '/xfers/oracle/dw/data/presser_sales.bad'
APPEND INTO TABLE STAGE.PRESSER_SALES
WHEN (ITEM_QTY != '-')
FIELDS TERMINATED BY ',' 
OPTIONALLY ENCLOSED BY '"' 
TRAILING NULLCOLS 
(ITEM_NUM     CHAR,
 TITLE        CHAR "TRIM(:TITLE)", 
 LIST_PRICE   CHAR "to_number(REPLACE(TRIM(:LIST_PRICE),'$'))", 
 ITEM_QTY     CHAR "to_number(REPLACE(REPLACE(TRIM(:ITEM_QTY),'(','-'),')'))", 
 PAYMENT_AMOUNT CHAR TERMINATED BY X'0D0A' "to_number(REPLACE(REPLACE(REPLACE(TRIM(:ITEM_QTY),'$'),'(','-'),')'))", 
 INSERT_USER      CONSTANT "SYSTEM", 
 INSERT_USER_DATE    SYSDATE, 
 INSERT_STATUS_CODE    CONSTANT "I"
) 

I was unable to get the TRANSLATE function to work properly, thus the ugly nested replaces. I had to account for numbers wrapped in parens '(val)' that mean the number is negative. I was told that this is some sort of accounting practice, so I now have one more reason to not like accountants.

Thank you all again for your input and your help in getting me un-stuck. It is greatly appreciated.