so arden kindly circumvented the immigration laws by keeping their daily salary for himself ( approximately 1200 to 1500 rupees per day , a sum few tourists were really prepared to quibble over , especially if theyd just landed and had not yet learned that such a figure was extravagant earnings indeed for many indians , whose national average monthly income in 2008 was only 3120 rupees , according to official census figures ) .