Standard of Electricity rate - The method of apartment pre-entry contract after the introduction of a heat consolidation shall be changed from the existing comprehensive contract method to the single contract method. - The amount of electricity usage and the amount before the introduction of a heat consolidation shall be based on the results of the imposition of households in 2

b. - Based on the unit price changed in March 2004 (as of May 2005) the unit price before and after the consolidation of heat.

b. - The calculation of the amount of electricity saving shall be calculated by applying the unit price of high-tension power rates for housing changed in March 2004 to the rate of electricity saving for the household calculated by applying the unit price of high-tension power rates for the same way as that for the previous household (a single contract) and the rate of electricity saving for the use of heat combined power facilities.

b.2. The amount of electric power and the amount of electric power bills (see Table 1: Table 1: the details of monthly changes in electric power rates): 2,588,148KWh/year * Korea Electric Power Rate 423,980,81 won/year.

3. The cost of fuel (urban gas) and the cost of fuel reduction (see attached Table 2): 920,798N / year / year 200,202,203 N. / year 490,203: 724,537N / year 324,537N / year 44: 52,542,536N / year 328: 542,136N / year 66N : 267,282,942,942, and year - (3) the cost of fuel consumption of boiler fuels after the consolidation of heat: 267,285,375 N. - the amount of fuel reduction in - the amount of fuel reduction in - the amount of fuel consumption in - the amount of fuel consumption in - the amount of five hundred and twenty45,75N / year - the amount of heating power generation.

4. Energy saving amount (see attached Table 3): Energy saving amount - Energy saving amount = Electricity saving amount (see attached Table 423,980,881) - Fuel saving amount (-105,624,107 won) - Annual saving amount = 318,356,74 (won/Year) 318,356,774 (cost/year).