3. Calculating Retirement: Jim, age 28, realizes he needs $1,200,000 to retire on (in addition to his company's pension and social security benefits). He thinks he can earn a 10% return. He wishes to retire at the age of 65. How much should he start putting into a monthly savings plan? (a) $ . If Jim started saving the same amount per month 5 years earlier, at age (b) _______, he would have earned (c) $_______________. So, beginning to save 5 years earlier would have earned Jim how much more money in retirement? (d) $ .