Cook Security Systems has a 37 500 line of credit which charges an annual percentage rate of prime rate plus 4 The starting balance on October 1 was 9 100 On October 4 they made a payment of 1 600 On October 13 the business borrowed 2 100 and on October 19 they borrowed 4 200 If the current prime rate is 6 what is the new balance in Round your answer to the nearest cent