Differential levelling is carried out from point $\text{P(B M}:+200.000 \mathrm{~m})$ to point $\text{R}$. The readings taken are given in the table.
| Points | Staff readings (m) | Remarks |
| Back Sight | Fore Sight |
| P | $(-) 2.050$ | | BM: $+200.000 \mathrm{~m}$ |
| Q | $1.050 $ | $0.950$ | Q is a change point |
| R | | $(-) 1.655$ | |
Reduced Level (in meters) of the point $\mathrm{R}$ is $\_\_\_\_\_\_\_\_$ (rounded off to $3$ decimal places).
