Davinda Corporation acquired equipment at a cost of $720,000 on January 1, 2018. The corporation adopted the sum-of-the-years-digits method of depreciation for this equipment and had been recording depreciation over an estimated life of eight years, with no residual value. At the beginning of 2021, a decision was made to change to the straight-line method of depreciation for this equipment. What will be the depreciation expense for 2021?

A :

$90,000

B :

$144,000

C :

$37,500

D :

$60,000