(Unit : million won)
classification
2004
2005
2006
2007
Sales
10,685
11,336
1,236,322
1,353,064
Operating Expense
9,293
9,914
1,006,547
1,123,817
- Labor
929
1,039
115,310
115,148
- Exclusive Circuit Rent
755
821
97,544
116,427
- Telecom Facility Rent
866
1,145
139,142
158,212
- D&A
1,715
1,512
154,031
145,220
- Commission
781
1,143
106,830
138,170
- Interconnection
1,234
1,120
111,035
126,792
- Settlement
931
992
90,834
107,002
- Advertising
226
190
15,442
15,734
- Outsourcing
674
642
64,207
66,525
- Bad Debt
154
180
7,444
6,130
- Others
1,028
1,130
104,728
128,456
Operating Income
1,392
1,422
229,775
229,247
(Operaing Margin)
13.0%
12.5%
18.6%
16.9%
Non-operating Income
637
367
21,013
15,922
Non-operating
Expense
1,640
1,191
115,603
62,814
Ordinary Income
388
598
135,185
182,355
Net Income
388
646
161,777
133,543