Calculating a moderate budget for a trip to South Korea, including accommodation, meals, transportation, and activities, can vary depending on personal preferences, travel style, and the level of comfort desired. However, I can provide a rough estimate based on average costs.

Accommodation:

Meals:

Transportation:

Activities:

Total Estimated Budget:

This estimate provides a moderate budget range for two persons for a four-day trip to Seoul and Busan, covering accommodation, meals, transportation, and activities. Actual costs may vary based on individual preferences, exchange rates, and the availability of discounts or special offers. It’s always a good idea to research prices, book accommodation and transportation in advance, and allocate some extra funds for unexpected expenses.