Multi-select problem: How does the next paragraph end?

How to calculate board feet
Measure the length, width, and depth in inches.
Use a stiff tape measure to measure the length, width, and depth of the board. Each measurement should be taken separately and recorded in inches.

OPTIONS: 1). Sit on the edge of your chair. The chair needs to be half submerged if you are starting on a flat surface such as a picnic table.. 2). At the end of each measurement, pull the tape measure outward and record its average size in inches. Calculate the length from top to bottom and around by subtracting it from the width of the board itself.. 3). Using this method of calculation, you must know the length, width, and depth of each board in inches. Round fractional sizes to the nearest quarter-inch.. 4). In the years before board feet were much more common, this measurement would not exist. Even if you are measuring a different piece, simply measure from one end of the board to the other..
3).