On the day their grandson Jeff was born, Mr. and Mrs. Zolob began an investment plan to help pay for his education. The grandparents contributed $50 at the start of every month, beginning on the day of Jeff's birth and continuing up to his 19th birthday. (Note that no contribution was made on his 19^th birthday.) The investment earned 6% compounded quarterly. How much was the investment worth when it was presented to Jeff as his 19th birthday present?