Mario and his dad decide to start saving for retirement at the same time. Mario is 20 years old and his dad is 40 years old. Both plan to put money into an IRA until they are 65. Both invest in the same things and earn the same rate of return, which is 7%. Finally, in their retirement years, both believe they can score an APR of 4%. If they both want to receive $4000 per month during retirement, then how much does each have to save now if they each plan to live an additional 25 years in retirement? The dad would need to save $nothing per month, rounded to nearest cent. Mario would need to save $nothing per month, rounded to nearest cent.