Answer & Explanation: Depreciation is the wear and tear of a given asset over a period of time.
1). Sum of the digits method of depreciation (SOYD) = (cost - salvage value) × year/ sum of digits
Sum if digits = 10 + 9 + 8 +7 + 6 + 5 + 4 + 3 +2 + 1 = 55
Cost - residual value = 343000 - 24000 = $319,000
SOYD =
Year 10 = 319,000 × 10/55 = 58,000
Year 9 = 319000 × 9/55 =52,200
2) 150% declining method = cost - salvage value × 150%/No. of useful life
= 319000 × 150%/10
= 319000 × 15% = $47,850