HP user manual User's Guide Page 171

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Appendix B: More About Calculations
V
Depreciation
For the given year number (YR) and with Factor (FACT) as a percentage:
For the last year of depreciation, DB equals the remaining depreciable value for the prior year.
Statistics
, ,
SL
BASIS SALV
LIFE
-------------------------------------=
SOYD
BASIS SALV
LIFE
LIFE 1+()
2
---------------------------
×
------------------------------------------------
LIFE YR 1+()×=
DB
BASIS
FACT
100
---------------
×
LIFE
---------------------------------------
1
FACT
100
---------------
⎝⎠
⎛⎞
LIFE
---------------------
⎝⎠
⎜⎟
⎜⎟
⎜⎟
⎛⎞
YR 1()
×=
x
x
n
---------=
y
y
n
---------=
x
w
xy
y
-----------=
Sx
x
2
x
()
2
n
----------------
n 1
----------------------------------=
Sy
y
2
y
()
2
n
----------------
n 1
----------------------------------=
σx
x
2
x
()
2
n
----------------
n
----------------------------------=
σy
y
2
y
()
2
n
----------------
n
----------------------------------=
r
xy
x
y
n
------------------
x
2
x
()
2
n
----------------
⎝⎠
⎜⎟
⎛⎞
y
2
y
()
2
n
----------------
⎝⎠
⎜⎟
⎛⎞
------------------------------------------------------------------------------------=
m
xy
x
y
n
------------------
x
2
x
()
2
n
----------------
-------------------------------------=
bymx=
x
ˆ
yb
m
-----------=
y
ˆ
mx b+=
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