Answer: $175,000
Step-by-step explanation:
Vern's depletion deduction for 2020 will be calculated thus:
= (Cost - Salvage value) / (Estimated Number of units × Number of units extracted
= 3500000/500000 × 25000
= 7 × 25000
= $175000
Therefore, Vern's depletion deduction for 2020 is $175000