| Variables | Observations | Standard Error | St. Deviation |
| Producers price | 120 | 0.2520926 | 2.761536 |
| Retails price | 120 | 0.2593678 | 2.841232 |
| Combined | 240 | 0.1841997 | 2.85361 |
| Degree of freedom = 119, | F = 0.9447 |