From an Analysis on Its Deposits,a Bank Determines That Account

From an analysis on its deposits,a bank determines that account processing and other operating expenses cost the bank $4.15 per month.It has also determined that non-operating expenses on its deposits are $1.65 per month.The bank wants to have a profit margin which is 10 percent of monthly costs.What monthly fee should the bank charge on its deposit accounts?

A) $6.38 per month
B) $5.80 per month
C) $4.57 per month
D) $4.15 per month
E) None of the options is correct