Ray Corporation purchased a concrete mixer on July $15,2020.$ Company officials

revealed the following information regarding this asset and its acquisition:

The concrete mixer was operated by construction crews in $2020$ & $2021$ for a toal of $5,225$ hours & $6,240$ hours;

and it produced $77,000$ yards and $125,000$ yards of concrete respectively.

It is company policy to take a half$-$year depreciation on all assets for which it used

the straight$-$line or double declining$-$balance depreciation method in the year of purchase.

Required:

Calculate the resulting depreciation expense for $2020$ & $2021$ under each of the following methods

and specify which methods allows the greatest depreciaton expense for each year.

Double$-$declining balance

Productive$-$output

Service$-$hours

Straight$-$line