Straight-line depreciation is used by Rainbow Corporation for its PPE. On Jan. 1, 2021, the balances of the PPE and associated accumulated depreciation accounts are P25,000,000 and P5,000,000, respectively, and on Dec. 31, 2021, they are P20,000,000 and P6,200,000. The corporation did not buy any PPE in 2021. The machinery, on the other hand, was sold for P3,000,000, resulting in a P400,000 loss.

For 2021, how much is the depreciation expense?