PAYMENT_METHOD is an optional field used to indicate how payment was made for this cost.
X_PAYMENT_METHOD is a fixed lexicon with the following values:
| Saved Value | Displayed Value |
|---|---|
| 00 | No Payment Required |
| 01 | Cash |
| 02 | Check |
| 03 | Credit Card |
| 04 | Line of Credit |
| 05 | Company Paid |
