An underwater acoustic observatory uses a high-fidelity hydrophone to record marine mammal communication. The system captures mono audio using a sampling rate of 48,000 Hz48,000\text{ Hz}48,000 Hz and a sample resolution of 24 bits24\text{ bits}24 bits. A continuous recording of a blue whale vocalisation lasts for 250 seconds250\text{ seconds}250 seconds.
What is the minimum file size of this recording in megabytes (MB)?
Assume 1 kilobyte (kB)=1,000 bytes1\text{ kilobyte (kB)} = 1,000\text{ bytes}1 kilobyte (kB)=1,000 bytes and 1 megabyte (MB)=1,000,000 bytes1\text{ megabyte (MB)} = 1,000,000\text{ bytes}1 megabyte (MB)=1,000,000 bytes.
You should show your working.