Which of the following is not a method for estimating depreciation charges?

Sinking fund method
Straight line method
Diminishing value method
Halsey

The correct answer is D. Halsey.

The sinking fund method, straight line method, and diminishing value method are all methods for estimating depreciation charges.

The sinking fund method is a method of depreciation that uses a sinking fund to accumulate money to replace the asset at the end of its useful life. The straight line method is a method of depreciation that allocates the cost of an asset evenly over its useful life. The diminishing value method is a method of depreciation that allocates a larger portion of the cost of an asset to the early years of its useful life and a smaller portion to the later years.

The Halsey method is not a method for estimating depreciation charges. It is a method of wage payment that is based on a combination of time and piecework rates.