On an Average Day, Your Firm Receives $11,800 in Checks

On an average day, your firm receives $11,800 in checks from customers. These checks clear the bank in an average of 2.1 days. The applicable daily interest rate is 0.015 percent. What is the highest daily fee your firm should pay to completely eliminate the collection float? Assume each month has 30 days.

A) $3.42
B) $3.72
C) $17.78
D) $34.18
E) $37.20