One more month to go, we are getting ready for the trip. Here's how the cost like:
Flight tickets :
SG to Seoul via Cathay - $580 (with extension in HK on the way back)
Seoul to Jeju via Asiana air - $181
USD67 (~SGD 102) per room per nite for twin sharing. So each person 6 nites (102 x 6)/2 = $306
Registration and banquet - USD70 ~ SGD $106
580+181+306+106 = $1170 per person, thats excluding meals and other expenditure.