This is the boss. No calculator. Every grade is a whole percent, every drop halves cleanly, the end areas make round hundreds, and the swell and the truck capacity divide exactly. Everything has been chosen to fit in your head.

One cut, five lines, and every answer feeds the next: the fall and the run give the grade; the grade carries the benchmark to the midpoint; the two cross sections give the bank volume; the swell turns bank into loose; and the truck capacity turns loose into a count of loads. Write each line down as you go — one slip at the top rolls all the way to the haul road.

Watch for the trap the whole chapter has been building toward, and it lives on the last two lines. The survey figure is bank measure. No truck on any site has ever carried bank measure. Skip line four and line five will be short by exactly the swell — a fifth to a quarter of the job — and it will be short every day until somebody counts boxes instead of trusting the sheet.

The bonus question afterwards does not want another number. It wants a decision: will the fleet clear the cut in the day, yes or no. The arithmetic exists only to earn you the right to make it, and the foreman in that question has already made it the wrong way.

Everything in the chapter rides in this one sheet. 5★ under par here is the chapter crown. Clock in.