Yelahanka 3BHK search: My real cost shock

Visited a few Prestige projects in Yelahanka this weekend for a 3BHK upgrade. The initial quoted price feels misleading. After adding stamp duty, registration, PLC, parking, the 'all-in' cost shot up. It's tough figuring out the *real* total acquisition cost for investor ROI. How much did these extra charges add for you guys, percentage-wise, when buying in Bengaluru?