At North Garden, there are 125 units of 8A, and 162 units of 8C.  Assuming 3 rows of 8C = approx 60 units
Total units unsold (as at 1pm) = approx 5 units 8A and 6 units 8C.
Total sold based on opened units = 120 units 8A and 54 units 8C = 174 of 185 units = 94.05% take-up / booking rate!
Bravo! 

When the show village, sales gallery and red carpet are ready, it helps a lot in giving confidence to the prospect buyers. After all, seeing is believing.  With sth real that can be visualised, it is probably worth more than thousand words.