Suppose that Denver Financial Co. expects the exchange rate of the New Zealand dollar (NZ$) to appreciate from its current level of 0.5 to 0.55 in 30 days. Denver Financial seeks to capitalize on this potential opportunity. Suppose that Denver Financial begins by borrowing $30,000,000 and converting it to New Zealand dollars (NZ$). The following table shows the short-term interest rates (annualized) in the interbank market.
Currency Lending Rate Borrowing rate
(Adjusted for 30-day period) (Adjusted for 30-day period)
U.S. Dollars 6.62% 7.10%
New Zealand Dollars (NZ$) 6.38% 6.86%
Suppose that Denver Financial takes its NZ$60,000,000.00 and invests it. Denver Financial can earn a 0.0053 percent return after 30-days. Hint: Assume 360 days in a year At the end of 30-days, Denver Financial will have a total of NZ:___________(New Zealand dollars) from the investment.
a. $54287100
b. $42223300
c. $60319000
d. $48255200

My actual calculation was not exactly that number, it was NZ$60,318,000, but it is the closest option. You calculate it by multiplying the present value x (1 + interest rate) = $60,000,000 x (1 + 0.0053) = $60,000,000 x 1.0053 = $60,318,000

The question only asks to calculate the interest in NZ$, not to convert them to US$.

Answer Link