Sharp EL-738 Depreciation calculations, Conversion between APR and EFF, Day and date calculations

Depreciation calculations

ROUND(NUM): If a display notation tab setting has been chosen, NUM is rounded and truncated to the specied number of places after the decimal point.

In the following equations, M01 = START MONTH, LIF = LIFE(N), CST = COST(PV), SAL = SALVAGE(FV), and DB = DB(I/Y).

Straight-line method (SL)

Calculations

If 1 < n < end_year then

Results

Sum-of-the-yearsdigits method (SYD)

Calculations

Results

Declining balance method (DB)

Calculations

Results

Error

CST < 0

SAL < 0

CST < SAL

LIF: when SL, LIF

when SYD or DB, LIF is not a positive integer

I/Y < 0 (DB only)

Conversion between APR and EFF

N, EFF ¬ APR

1

(( EFF + 1)N–1) N 100 100

Error

EFF

N, APR ¬ EFF

APR

(( 100N + 1)N–1) 100

Error

APR ≤ –100

N

Day and date calculations

In day and date calculations, this calculator conforms to rules set up in the book titled Stan- dard Securities Calculation Methods, by Jan Mayle, Securities Industry Association, 1993.

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