Surveying and Levelling

In levelling with a dumpy level, a backsight of $1.450\text{ m}$ is taken on a benchmark of $RL = 100.000\text{ m}$. A foresight of $2.150\text{ m}$ is then taken on change point $CP_1$. The reduced level ($RL$) of $CP_1$ (in meters) is: