I just want to know how to get the number of "1.0240" and "1.0170."

Problem 7.7 Takeshi Kamada - -CIA Japan Takeshi Kamada, a foreign exchange trader at Credit Suisse (Tokyo), is exploring covered interest arbitrage possibilities. He wants to invest $5,000,000 or its yen equivalent, in a covered interest arbitrage between U.S. dollars and Japanese yen. He faced the following exchange rate and interest rate quotes Value $5,000,000 118.60 117.80 4.800% 3.400% Yen Equivalent Assumptions Arbitrage funds available Spot rate (WS) 180-day forward rate (S) 180-day U.S. dollar interest rate 180-day Japanese yen interest rate 593,000,000 Arbitrage Rule of Thumb: If the difference in interest rates is greater than the forward premium/discount, or expected change in the spot rate for UIA, invest in the higher interest yielding currency. If the difference in interest rates is less than the forward premium (or expected change in the spot rate), invest in the lower yielding currency. Difference in interest rates (iY-is) Forward premium on the yern CIA profit potential 1.400% 1.358% 4.042% This tells Takeshi Kamada that he should borrow yen and invest in the higher yielding currency, the U.S. dollar, to lock-in a oovered interest arbitrage (CIA) profit. U.S. dollar interest rate (180 days) 4.800% 5,000,000 1.0240 5,120,000 Spot (N/s) 118.60 > 180 days Forward-180 117.80 > /S) 593,000,000.00 Japanese yen 603,136,000 603,081,000 55,000 1.0170 3.400% Japanese yen interest rate (180 days) Takeshi Kamada generates a CIA profit by investing in the higher interest rate currency, the dollar, and simultaneously selling the dollar proceeds forward into yen at a forward premium which does not completely negate the interest differential