17. At close of business a bank's foreign currency holdings consist of 100,000 euros and 100,000 Swiss francs. The current exchange rates for the two currencies are: for the euro (in $ per ) 1.1133, and for francs (in Fr per $) .09569. The standard deviation of changes in the euro is 0.005732, and in the franc, 0.004954, and the correlation coefficient between changes in the two currencies is 0.8095. DEAR for the euro (francs) is -1972.01 (-1599.85).

a. What is the DEAR for the bank's foreign currency portfolio?

b. Specify the method used.