There is an answer for this problem on Chegg, but it doesn't answer my questions. Don't copy and paste that work because I will downvote it. I will eventually have a test on this and I want to know how to get the missing info.

In 2016, the Marion Company purchased land containing a mineral mine for $1,600,000. Additional costs of $600,000 were incurred to develop the mine. Geologists estimated that 400,000 tons of ore would be extracted. After the ore is removed, the land will have a resale value of $100,000 To aid in the extraction, Marion built various structures and small storage buildings on the site at a cost of $150,000. These structures have a useful life of 10 years. The structures cannot be moved after the ore has been removed and will be left at the site. In addition, new equipment costing $80,000 was purchased and installed at the site. Marion does not plan to move the equipment to another site, but estimates that it can be sold at auction for $4,000 after the mining project is completed In 2016, 50,000 tons of ore were extracted and sold. In 2017, the estimate of total tons of ore in the mine was revised from 400,000 to 487,500. During 2017, 80,000 tons were extracted. Required: 1. Compute depletion and depreciation of the mine and the mining facilities and equipment for 2016 and 2017. Marion uses the units-of-production method to determine depreciation on mining facilities and equipment. 2. Compute the book value of the mineral mine, structures, and equipment as of December 31, 2017 Given Data P20-07: MARION COMPANY $ 1,600,000 $ 600,000 400,000 $ 100,000 $ 150,000 Land purchase Additional development costs Estimated tons extracted Land resale value Building costs Useful life of buildings New equipments cost Auction price of equipment 2016 ore extracted and sold Revised estimated tons extracted 2014 ore extracted 10 years $ $ 80,000 4,000 50,000 tons 487,500 80,000 tons A B E F 4 Requirement 1: MARION COMPANY Depletion and Depreciation 8 9 10 11 12 Cost of mineral mine: Purchase price Development costs $ 1,600,000 600,000 $ 2,200,000 Correct 13 Depletion: Land resale value Estimated ore extracted (tons) Depletion per ton '$ 2,100,000 400,000 5.25 Correct 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 2016 Ore extracted (tons) Depletion $ 50,000 262,500 Correct 2014 Ore extracted (tons) Revised ore extraction (tons) Revised depletion rate Depletion 1,837,500 437,500 4.20 336,000 Correct Depreciation: Structures: Building cost Depreciation per ton $ 150,000 2016 depreciation Revised depreciation rate 2014 depreciation 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Equipment: Equipment cost Estimated equipment sale Depreciation per ton $ $ 80,000 4,000 2016 depreciation Revised depreciation rate 2014 depreciation 48 Requirement 2: MARION COMPANY Book Value 2,200,000 Mineral mine: Cost Less accumulated depletion: 2016 depletion 2014 depletion Book value, 12/31/2014 $ 262,500 336,000 598,500 $ 1,601,500 Correct 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 150,000 Structures: Cost Less accumulated depreciation: 2016 depreciation 2014 depreciation Book value, 12/31/2014 80,000 Equipment: Cost Less accumulated depreciation: 2016 depreciation 2014 depreciation Book value, 12/31/2014