financial instruments

Hi, I doubt that you would be required to do the calculations as such in the exam but if we bought it at $25,000 when the index was 1,944 then we need to use the fact that its value changes in proportion to the index. To do so we take 25,000/1,944 = 12.86 and then multiply by 1,800 to get $23,148. The difference between the $25,000 and $23,148 then gives you your answer. Thanks