Appendix D: Formulas Used 189

Depreciation

L= asset’s useful life expectancy.

SBV = starting book value.

SAL = salvage value.

FACT = declining-balance factor expressed as a percentage.

j= period number.

DPNj

= depreciation expense during period j.

RDVj

= remaining depreciable value at end of period j

 

= RDVj–1DPNj where RDV0 = SBV SAL

RBVj

= remaining book value = RBVj–1DPNj where RBV0 = SBV

Y1

= number of months in partial first year.

Straight-Line Depreciation

Keyboard function:

DPNJ

=

 

SBV SAL

 

for j = 1, 2, …, L

L

 

 

 

 

 

 

Program for partial first year:

DPN =

SBV SAL

 

Y1

 

 

 

1

 

 

L

12

 

 

 

 

 

DPNJ

=

 

SBV SAL

 

for j = 2, 3, …, L

 

L

 

 

 

 

 

 

 

DPNL + 1

= RDVL

 

 

 

Sum-of-the-Years-Digits Depreciation

SOYDk = (W + 1)(W + 2F) 2

where W = integer part of k F = fractional part of k.

(i.e., for k = 12.25 years, W = 12 and F = 0.25).

Keyboard function:

DPNJ = (L j + 1) (SBV SAL)

SOYDL

File name: hp 12c_user's guide_English_HDPMBF12E44

Page: 189 of 209

Printered Date: 2005/7/29

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