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The formula to calculate board feet is:

\[ \text{board feet} = \frac{\text{length (ft)} \times \text{width (in)} \times \text{thickness (in)}}{12} \]

Board feet is a unit of measurement for lumber, representing the volume of a board that is 1 foot long, 1 foot wide, and 1 inch thick.

Let's assume the following values:

- Length = 8 feet
- Width = 10 inches
- Thickness = 1.25 inches

Using the formula:

\[ \text{board feet} = \frac{8 \times 10 \times 1.25}{12} = 8.33 \text{ board feet} \]

Length (feet) | Width (inches) | Thickness (inches) | Board Feet |
---|---|---|---|

6 | 8 | 1 | 0.33 |

7 | 8 | 1 | 0.39 |

8 | 8 | 1 | 0.44 |

9 | 8 | 1 | 0.50 |

10 | 8 | 1 | 0.56 |

11 | 8 | 1 | 0.61 |

12 | 8 | 1 | 0.67 |

13 | 8 | 1 | 0.72 |

14 | 8 | 1 | 0.78 |

15 | 8 | 1 | 0.83 |

16 | 8 | 1 | 0.89 |

17 | 8 | 1 | 0.94 |

18 | 8 | 1 | 1.00 |

19 | 8 | 1 | 1.06 |

20 | 8 | 1 | 1.11 |

21 | 8 | 1 | 1.17 |

22 | 8 | 1 | 1.22 |

23 | 8 | 1 | 1.28 |

24 | 8 | 1 | 1.33 |

25 | 8 | 1 | 1.39 |