| Tax previously determined for 1949 | $7,788 |
| Net income for 1949 upon which tax previously determined was based | 30,000 |
| Less: Rents erroneously included | 5,000 |
| Balance | 25,000 |
| Adjustment for contributions (add 15 percent of $5,000) | 750 |
| Net income as adjusted | 25,750 |
| Tax as recomputed | 6,152 |
| Tax previously determined | 7,788 |
| Difference | 1,636 |
| Amount of adjustment to be refunded or credited | 1,636 |