Help me please...

At the beginning of 2016, Robotics Inc. acquired a manufacturing facility for $12.8 million. $9.8 million of the purchase price was allocated to the building. Depreciation for 2016 and 2017 was calculated using the straight-line method, a 25-year useful life, and a $1.8 million residual value. In 2018, the estimates of useful life and residual value were changed to 20 total years and $580,000, respectively.

What is depreciation on the building for 2018?

Thank you!