| W1 | W2 |
| Begin transaction | |
| Begin transaction |
| Read current balance: WAIT |
| Read current balance: 419.87 | WAIT |
| Compute new balance -100 → 319.87 | WAIT |
| Write new balance: 319.87 | WAIT |
| Commit transaction | WAIT |
| Read current balance: 319.87 |
| Compute new balance -200 → 119.87 |
| Write new balance: 119.87 |
| Commit transaction |