Chang Industries purchased a piece of equipment on January 1, 2025. The equipment cost HK\($600,000\) and has an estimated life of 8 years and a residual value of HK\($80,000.\) What was the depreciation expense for the asset for 2026 under the double-declining-balance method?

a. HK\($65,000\).

b. HK\($112,500\).

c. HK\($150,000\).

d. HK\($65,620\).