Although the direct answer is not given, (p.8) table shows the Operating expenses (9,114,357,241 KRW Thousand) & Dividends (682,378,746 KRW Thousand) & Income taxes(665,334,153 KRW thousand).

The total of the operating expenses, dividends and income taxes is

= 10,462,070,140,000(KRW)

= 9,415,863,126.00 USD

* Converter URLs:

https://themoneyconverter.com/KRW/USD.aspx

In addition, the page also says that contribution to universal service is 27.3 KRW billion for 2007,