Carow Industries has just started to deposit $300 at the end of each month into its employees' retire- ment fund (i.e., the first deposit will take place one month from now).  These deposits will continue for each em- ployee until they retire.  Phillip Powell, an employee at Carow Industries is planning to retire in 20 years.  From the instant when he retires, Phillip would like to withdraw $6000 per month (at the end of each month) from his retire- ment account for the following 25 years.  If Phillip currently has $75000 invested and can earn 4.8% APR with monthly compounding, on all money invested (including that from Carow), how much will he need to put into the account at the end of each month for the next 20 years in order to have enough money to retire and then make the withdrawals as planned?