Four friends Ashok, Bashir, Chirag and Deepak are out for shopping. Ashok has less money than
three times the amount that Bashir has. Chirag has more money than Bashir. Deepak has an
amount equal to the difference of amounts with Bashir and Chirag. Ashok has three times the
money with Deepak. They each have to buy at least one shirt, or one shawl, or one sweater, or one
jacket that are priced Rs. 200, Rs. 400, Rs. 600, and Rs. 1,000 a piece respectively. Chirag borrows
Rs. 300 from Ashok and buys a jacket. Bashir buys a sweater after borrowing Rs. 100 from Ashok
and is left with no money. Ashok buys three shirts. What is the costliest item that Deepak could buy
with his own money?