Only really need someone to tell me how the cross-rate is calculated here, as there is another example already completed.

B. You have SF 10,000,000. Given the information in Table 4.2 on the three currency rates of different banks, can you make riskless profit on the Swiss francs by triangular arbitrage? Show your steps and the amount of profit. Table 4.2. Currency Rates Given Parameter Values Beginning funds in Swiss francs (SF) 10,000,000.00 Bank of Japan /$) 120.00 Swiss Banking Corp (SF/S) 1.6000 Royal Bank (ASF) 80.00