What would be the net annual cost of the following checking accounts? a. Monthly fee. $3.50: processing fee, 30 cents per check, checks written, an average of 15 a month. (Round your answer to 2 decimal places. Input the amount as a positive value.) Net annual cost b. Interest earnings of 3 percent with a $450 minimum balance: average monthly balance. $900: monthly service charge of $11 for falling below the minimum balance, which occurs five times a year (no interest earned in these months). (Do not round intermediate calculations. Round your answer to 2 decimal places. Input the amount as a positive value.) Net annual cost