The formulas used for the two depreciation methods are as follows.
• Straight Line
Depreciation Expense = Calculated Accumulated - old Accumulated
Accumulated Expense = (Depreciable Base * (Number of Months to Depreciate / (Useful Life in Years * 12 Months per Year)))
• Salvage Value
Depreciation Expense = ((Calculated Accumulated - Salvage Value) - old Accumulated)
Accumulated Expense = ((Depreciable Base - Salvage Value) * (Number of Months to Depreciate / (Useful Life in Years * 12 Months per Year)))
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