I've asked this question before, but I still don't understand it. Do you mind showing me your step by step solution
Stefania’s parents calculate that they will need $7500 every 3 months for 4 years to pay for Stefania’s college. They have 18 years until she is college age. How much should they invest every 3 months at 6.4%/a compounded quarterly for the next 18 years if they plan to withdraw $7500 per quarter for the 4 years after that?
Thanks in Adavnce