After considering all the expenses, including food, transport and other expenses, the money to be spent on a 4-year B.E. course sums up to about Rs. 18 Lacs, i.e. Rs. 4.5 Lacs per annum.
At present, the fees to be paid is about Rs. 1.75 Lacs per semester. And by personal experience, I can say that there is an extra disbursement of around Rs. 25000 per semester. Which accounts for expenditure of Rs. 2 Lacs per semester, i.e. Rs. 16 Lacs for the total course of 4 years.
Keeping in mind the annual fee hike of BITS Pilani, additional Rs. 2 Lacs must be added to the lump-sum, giving a net expenditure of Rs. 18 Lacs.