Describes expense codes
| Column | Type | References | Comments |
| id | Integer | Primary key | |
| vdb_id | Integer | ||
| deleted | Date | Date this expense code was deleted | |
| name | String | Short name | |
| description | String | Description | |
| ref_no | String | Accounting code for this expense code | |
| markup | Float | ||
| is_taxable | Boolean (t or f) |