Haven't watched part 2, caught part 1 on Max and was not impressed, they made it just another take on Flashpoint and the original story was nothing like that.
"The terms lakh or 1,00,000 (one hundred thousand, written as 100,000 outside the Indian subcontinent) and crore or 1,00,00,000[1] (ten million, written as 10,000,000 outside the subcontinent) are the most commonly used terms in Indian English to express large numbers in the system."
Soo...
"lakh: 150,000 rupees in India is referred to as "1.5 lakh rupees", which is written as 1,50,000 rupees;
crore: 30,000,000 (thirty million) rupees is referred to as "3 crore rupees", which is written as 3,00,00,000 rupees with commas at the thousand, lakh, and crore places."
I guess if you grew up with it, it makes perfect sense.
Largely it's going to depend on who your audience is. If you're writing for an American audience, use American conventions. British audience, British conventions.