The following staff readings were taken with a level, the instrument having been moved after third and sixth reading:
$$
\begin{array}{lllllllll}
2.200 & 1.620 & 0.980 & 2.250 & 2.840 & 1.280 & 0.600 & 1.960 & 1.450
\end{array}
$$
The RL of first point is 100.00 m . Rule out a page of level book and enter the above readings. Calculate the RL of all points. Apply the checks.