Profile Level Notes:

The elevation of BMA$={678\mathrm{.}58}^{\text{'}}$

$BS($plus sight$)$ on BMA$={6\mathrm{.}91}^{\text{'}}$

IFS $($minus sight$)$ on STA $0+00=2\mathrm{.}37\text{'}$

IFS $($minus sight$)$ on STA $0+50={3\mathrm{.}08}^{\text{'}}$

IFS $($minus sight$)$ on STA $1+00={4\mathrm{.}95}^{\text{'}}$

FS $($minus sight$)$ on TP$1=8\mathrm{.}87\text{'}$

$BS($plus sight$)$ on TP$1={1\mathrm{.}68}^{\text{'}}$

IFS $($minus sight$)$ on STA $1+50=11\mathrm{.}49\text{'}$

FS $($minus sight$)$ on TP$2=4\mathrm{.}75$

What is the elevation of the TP$1?$