A lady buys goods worth 200 bucks from a shop (assuming the shopkeeper is selling goods at zero profit). The lady pays with a banknote  worth 1000 bucks to the shopkeeper. The shopkeeper gets the change from the next shop & keeps 200 for himself & returns 800 to the lady. After sometime the next shop owner returns the 1000 note saying it is fake & takes his money back. How much loss did the shopkeeper suffer? 
Sam has 3000 bananas. He had to take them to market 1000 km away on his only camel. The camel can only carry 1000 bananas at a time. The camel eats 1 banana for every 1km it travels. What is the maximum number of bananas that Sam can take to the market?