Suppose your friend, John will start his retirement saving when he will be 30 years old. Assuming he will retire at age 70 and he wants to have 1.5 million dollars from the 40 years of the retirement savings. Suppose he will deposit same amount at the end of each month and the retirement account will earn 7.8% per year. Then, he calculated his monthly deposit amount to achieve his goal. If your retirement plan is similar including same retirement age, same monthly deposit amount, same earning (7.8%) except you started 7 years earlier than John (you started at 23 years old), how much more money you will have at age 70 than John?