Answer:
$288,000
Explanation:
Sum-of-the-years'-digits method provide for higher depreciation to be charged early in the life of the asset with lower depreciation in the later year.
Sum of digits = 5 + 4 + 3 +2 +1 = 15
2020
Depreciation = 5 / 15 x $480000
= $160,000
2021
Depreciation = 4 / 15 x $480000
= $128,000
therefore,
Accumulated depreciation = $160,000 + $128,000 = $288,000
thus
The accumulated depreciation on this machinery at March 31, 2021, should be $288,000.