Steve and Robert were college roommates, and each is celebrating their 30th birthday today. When they graduated from college nine years ago, they each received $5,000 from family members for establishing investment accounts. Steve and Robert have added $5,000 to their separate accounts on each of their following birthdays until today. Steve has withdrawn nothing from the account, but Robert made one withdrawal on his 27^th birthday. Steve has invested the money in Treasury bills that have earned a return of 6% per annum (p.a.), while Robert has invested his money in stocks that have earned a return of 12% p.a. Both Steve and Robert have the same amount in their accounts today.

REQUIRED: Compute for the amount of cash withdrawn by Robert during his 27^th birthday