Calculate a country's GDP if for the year, consumer spending is $900 million, government spending is $250 million, investment by businesses is $180 million, exports are $85 million and imports are $100 million.
A bank offers 5% compound interest per half year. A customer deposits Rs 4800 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest?