The opening balance of Prize Fund was Rs 1,00,000. During the year, donations received towards this fund amounted to Rs 15,400, amount spent on prizes was Rs 12,300 and interest received on prize fund investment was Rs 4,000. The closing balance of Prize Fund will be :

Qwest airlines has implemented a program to recycle all plastic drink cups used on their aircraft. their goal is to generate $7 million by the end of the recycle program's five-year life. each recycled cup can be sold for $0.005 (1/2 cent). a. how many cups must be recycled annually to meet this goal? assume uniform annual plastic cup usage and a 0% interest rate. b. repeat part (a) when the annual interest rate is 12%. c. why is the answer to part (b) less than the answer to part (a)?