Morning Star Air (China). Morning Star Air, headquartered in Kunming, China, needs US$30,000,000 for one year to finance working capital. The airline has two alternatives for borrowing:

a. Borrow US$30,000,000 in Eurodollars in London at 7.40% per annum

b. Borrow HK$234,375,000 in Hong Kong at 7.15% per annum, and exchange these Hong Kong dollars at the present exchange rate of HK$7.8125/US$ for U.S. dollars.

At what ending exchange rate would Morning Star Air be indifferent between borrowing U.S. dollars and borrowing Hong Kong dollars?