| Variables | Coef. | Std. Error | t-Value | P-Value |
| Primary Factors |
|
|
|
|
| Qty. | −0.4483*** | 0.1326 | −3.38 | 0.004 |
| Transportation | 0.6899*** | 0.1310 | 5.27 | 0.000 |
| Carriage Cost | 0.2932*** | 0.1221 | 2.40 | 0.009 |
| Seasonal Cost | 0.1017* | 0.0576 | 1.77 | 0.096 |
| High Quality Type |
|
|
|
|
| Odum | 0.8550*** | 0.0996 | 8.59 | 0.000 |
| Dahoma | 0.4891*** | 0.1187 | 4.12 | 0.000 |
| Mahogany | 0.2191** | 0.1076 | 2.04 | 0.042 |
| Mansonia | 0.1964*** | 0.0503 | 3.91 | 0.000 |
| Wawa | 0.1953*** | 0.0217 | 9.02 | 0.000 |
| Low Quality Type |
|
|
|
|
| Otie | −0.0339* | 0.0198 | −1.71 | 0.087 |
| Yaya | −0.0797*** | 0.0293 | −2.72 | 0.007 |
| Chenchen | −0.0789** | 0.0305 | −2.59 | 0.010 |
| Waterpou | −0.1057*** | 0.0252 | −4.19 | 0.000 |
| Cebia | −0.0403* | 0.0222 | −1.81 | 0.070 |
| Constant | 0.9715 | 0.0483 | 20.12 | 0.000 |
| N | 90 |
|
|
|
| F-Statistics | 61.31 |
|
|
|
| P > F | 0.0000 |
|
|
|
| R-Squared | 0.9369 |
|
|
|
| Adj. R-Squared | 0.9279 |
|
|
|