The answer is P54,000,000. I just need the complete solution.

On December 31, 2011, the building of Orange Co. was revalued. Information on revaluation date is shown below: Cost Replacement cost Building 72,000,000 144,000,000 Accumulated depreciation 16,000,000 Residual value 8,000,000 8,000,000 Remaining useful life 10 years 12 years How much is the revaluation surplus? l