Depletion; change in estimate
• LO20–4
In 2018, 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 2018, 50,000 tons of ore were extracted and sold. In 2019, the estimate of total tons of ore in the mine was revised from 400,000 to 487,500. During 2019, 80,000 tons were extracted.
Required:
1. Compute depletion and depreciation of the mine and the mining facilities and equipment for 2018 and 2019. 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, 2019.
(1)
Depreciation: Depreciation refers to decrease in value of the asset over a period due to use, wear and tear or obsolescence. In other words it is a method of reallocating the cost of the asset over its useful life.
Depletion: Depletion is the reduction in the value of natural resource which belongs to the company.
To compute: The depletion and depreciation of the mine, mining equipments and facilities of Company M for 2018 and 2019.
Explanation of Solution
Calculate the cost of the mineral mine
Cost of the mineral mine is purchase price plus development expenses. Use the following formula:
Therefore, cost of the mine is $2,200,000.
- a. Calculate depletion on mine for the years 2018 and 2019.
To compute a unit depletion rate, deduct the residual value of the asset from the asset value and divide it by the total number of units that expect to recover. The formula for the unit depletion rate is:
In 2018, Company M estimated that 400,000 tons of ore would be extracted and residual value would be $100,000. In the year 2019, the estimate of total tons of ore in the mine was revised from 400,000 tons to 487,000 tons. In 2018, 50,000 tons and during 2019, 80,000 tons of ore were extracted.
Depletion of mineral mine for 2018:
Depletion of mineral mine for 2019:
- b. Compute depreciation on mining equipments for the years 2018 and 2019:
In the given case, Company M uses the units of production method to determine the depreciation on mining facilities and equipments. A unit of production method determines the depreciation based on the actual production or usage of the asset. Mining equipment costing $80,000 was purchased and installed at the site and estimates that it can be sold at auction for $4,000 after the mining project is completed.
Use the below formula to determine the amount of depreciation per ton.
Depreciation on mining equipments for 2018:
Depreciation on mining equipments for 2019:
- c. Compute depreciation on mining facilities for the years 2018 and 2019:
Company M built various structures and small storage buildings on the site at a cost of $150,000 having useful life of 10 years. No residual value is estimated.
Depreciation on mining facilities for 2018:
Depreciation on mining facilities for 2019:
Hence, Depletion of mineral mine for the year 2018, is $262,000, for the year 2019, revised depletion is $336,000. Depreciation on mining equipment for the year 2018, is $9,500, for the year 2019 revised depreciation is $12,160. Depreciation on the mining facilities for the year 2018, is $18,750, for the year 2019 revised depreciation is $24,000.
(2)
To compute: The book values of the mineral mine, facilities (structures) and equipments as of December 31, 2019.
Explanation of Solution
Compute the book value of the mineral mine.
Computation of the book value of the mineral mine is as follows:
Particulars | Amount in $ |
Amount in $ |
Cost of the mineral mine | 2,200,000 | |
Less: Accumulated depletion: | ||
For the year 2018 | 262,500 | |
For the year 2019 | 336,000 | (598,500) |
Book value of the mineral mine | 1,601,500 |
Table (1)
Hence, book value of the mineral mine is $1,601,500 as of December 31, 2019.
Compute the book value of the mining facilities (structures):
Computation of the book value of the mining facilities (structures) is as follows
Particulars | Amount in $ |
Amount in $ |
Cost of the mining facilities | 150,000 | |
Less: Accumulated depreciation: | ||
For the year 2018 | 18,750 | |
For the year 2019 | 24,000 | 42,750 |
Book value of the mining facilities | 107,250 |
Table (2)
Hence, book value of the mining facilities (structures) is $107 250, as of December 31, 2019.
Compute the book value of the mining equipments:
Computation of the book value of the mining equipments is as follows
Particulars | Amount in $ |
Amount in $ |
Cost of the mining equipments | 80,000 | |
Less: Accumulated depreciation: | ||
For the year 2018 | 9,500 | |
For the year 2019 | 12,160 | 21,660 |
Book value of the mining equipment | 58,340 |
Table (3)
Hence, book value of the mining equipments is $58,340, as of December 31, 2019.
Accumulated depreciation is deducted from the cost of the asset because of reduction in the value of the asset due to usage and extracting the mineral ore
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Chapter 20 Solutions
Loose Leaf Intermediate Accounting
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