On an Average Day, Your fiRm Receives $21,800 in Cheques

On an average day, your firm receives $21,800 in cheques from customers. These cheques are processed and clear the bank in an average of 1.8 days. The applicable daily interest rate is .0185
Percent. What is the highest daily fee your firm should pay to completely eliminate the collection
float? Assume each month has 30 days.

A) $5.42
B) $5.97
C) $6.50
D) $7.26
E) $8.01