I have booked the following DONE3 ex BOM :

BOM-KUL-HKG-JFK-SFO-DFW-PVR-DFW-SJO-MIA-LHR(x)-IST-LHR(x)-MAD-DME-HKG-BOM

Even though the first flight is on MH, the MH office in BOM was unable to book a RTW as they say dont have the pricing system yet. So I called Cathay in Mumbai. They booked the segments and gave me a price really quick in a couple of hours.

Fare : INR 385620
Taxes: INR 83175
Total : INR 468795

Do the taxes seem ok ? It comes to around $1500. Total is around $8845.