12. Bob accepts credit cards and checks. He is thinking about accepting debit cards, which would immediately transfer money into his bank account, but would cost $50/ month for the equipment and fees. Bob currently loses $600/ year because of receiving bad checks. He also loses about 120 days of interest on checks because of bank holidays and weekends. He currently earns 3% interest on bank accounts and receives about $2000/ day in checks. a. What is Bob's total annual cost for the debit card service? b. What is the benefit? c. Should Bob implement the debit card system