1. Introduction International Payment (Thanh toán quốc tế) is a core subject for finance and banking students. Exercises in this field often focus on calculating exchange rates, determining cross rates, identifying profits from arbitrage, and managing risks using instruments like letters of credit (L/C). Mastering these exercises requires both theoretical understanding and practical calculation skills. 2. Common Types of Exercises 2.1. Exchange Rate Calculations Objective: Determine Bid (buying) and Ask (selling) rates between two currencies.

To buy USD, the bank sells USD → use Ask rate = 25,480. Amount VND = 1,000 × 25,480 = 25,480,000 VND. 2.2. Cross Rate Calculation Objective: Derive exchange rate between two non-USD currencies using USD as a bridge.

Given USD/VND = 25,450 – 25,480. Calculate the amount of VND needed to buy 1,000 USD.