The parking rate has changed since my last weekend visit (used to be RM 7 per entry ...and now is RM10/entry during weekend & public holiday .
Also, for weekdays
1st hour - RM 3 , subsequent hour RM 3 ,
After 6pm , Monday - Friday RM 7 flat .
This is effective from 1st Nov 2012 according to Isetan Lot10 .
Alternatively, you may consider to park Fahrenheit ,
Starhill is also RM 10 flat fate during weekend end .