Answer:
depreciable value = $498,000 - $44,820 = $453,180
a. depreciation expense per year = $453,180 / 12 years = $37,765
depreciation expense year 1 = $37,765
depreciation expense year 2 = $37,765
depreciation expense year 3 = $37,765
b. total digits = 12+11+10+9+8+7+6+5+4+3+2+1 = 78
depreciation expense year 1 = 12/78 x $453,180 = $69,720
depreciation expense year 2 = 11/78 x $453,180 = $63,910
depreciation expense year 3 = 10/78 x $453,180 = $58,100