how to calculate this.give detail calculation

Depreciation: Year Rate Year 0123456 1 2 3 4 5 6 20% 32% 19% 12% 11% 6% Current Depreciation Accumulated Depreciation Book Value 500,000 100,000 100,000 400,000 160,000 260,000 240,000 95,000 355,000 145,000 60,000 415,000 85,000 55,000 470,000 30,000 30,000 500,000 0