Factors that Determine Depreciation Expense a)Initial Cost $24, 000 minus b Estimated Residual Value $2,000 equals Depreciable Cost $22,000 divided by ⊙ Estimated Useful life 5 years equals Periodic Depreciation Expense $4, 400 per year c9-11C9 - 11 Periodic Depreciation Expense $4,400 per year equals c Estimated Useful Life 5 years divided by Depreciable Cost $22,000 equals Factors that Determine Depreciation Expense b Estimated Residual Value $2,000 minus a Initial Cost $24,000