1. On February 1, 2018, ABC Company purchased the right to remove mineral deposits from a quarry. The deposit is to be sold as an ingredient for a high way construction. The cost of the quarry right is Php 164,000 with an estimated salable rock of 20,000 tons. During 2018, the company loaded and sold 4,000 tons of mineral deposit and estimated that 16,000 tons remained at December 31, 2018. At January 1, 2019, the company estimated that 20,000 tons still remained. During 2019, the company loaded and sold 8,000 tons.

Required: Based on the above facts, answer the following:

1. How much is the depletion in 2018?
2. How much is the depletion in 2019?