During 2020, Sunland Company acquired a mineral mine for $3500000 of which $390000 was ascribed to land value after the mineral has been removed. Geological surveys have indicated that 10 million units of the mineral could be extracted. During 2020, 1480000 units were extracted and 1280000 units were sold. What is the amount of depletion expensed for 2020?

$448000.

$460280.

$390000.

$398080.