To find the difference in level between points A and B, you need to subtract the elevation of point A from the elevation of point B.

Given:

• Backsight (B.S) = 3.560 m (elevation of point B)
• Foresight (F.S) = 2.860 m (elevation of point A)

Difference in level (H.I) = B.S - F.S

H.I = 3.560 m - 2.860 m H.I = 0.700 m

Therefore, the difference in level between points A and B is 0.700 meters.