A relatively calm room has background sound power level (SPL) of 30 decibels (dB). A television and a radio with SPL of $80 \mathrm{~dB}$ and $70 \mathrm{~dB}$, respectively, started operating simultaneously in this room. Given the reference sound power is $10^{-12}$ Watts, what will be the resulting SPL in the room, assuming all the sources operate independently?
- $180.0 \mathrm{~dB}$
- $80.4 \mathrm{~dB}$
- $82.4 \mathrm{~dB}$
- $150.0 \mathrm{~dB}$
