I am wondering if anyone has taken Financial Management and used the textbook Essentials of Health Care Finance by William O. Cleverley? I need help understanding how to answer this question. Can you please assist and provide calculation that I can follow and learn from?

Community Hospital has annual net patient revenues of $150 million. At the present time, payments receive by the hospital are not deposited for six days on average. The hospital is exploring a lock-box arrangement will promises to cut the six days to one day. If these funds releases by the lock-box arrangement can be invested at 8%, what will the annual savings be? Assume the bank fee will be $2,000 per month.

Please show and explain calculations so that I can understand!