ACalculation Formulas

a: Interest portion of payment PM1 (INT)INTPM1 = I BALPM1–1i I (PMT sign)b: Principal portion of payment PM1 (PRN)PRNPM1 = PMT + BALPM1–1ic: Principal balance upon completion of payment PM2 (BAL)

BALPM2 = BALPM2–1 + PRNPM2

d: Total principal paid from payment PM1 to payment PM2 (ΣPRN)

ΣPM2

PM1

PRN = PRNPM1 + PRNPM1+1 + … + PRNPM2

e: Total interest paid from payment PM1 to payment PM2 (ΣINT)

a + b = one repayment (PMT)

PM2

 

Σ INT = INTPM1 + INTPM1+1 + … + INTPM2

PM1

 

BAL0 = PV .......................

Payment: End

 

(Setup Screen)

INT1 = 0, PRN1 = PMT ... Payment: Begin (Setup Screen)

Converting between the Nominal Interest Rate and Effective Interest Rate

The nominal interest rate (I % value input by user) is converted to an effective interest rate (I%´) for installment loans where the number of annual payments is different from the number of annual compoundings calculation periods.

 

 

 

I%

 

[C / Y ]

 

 

 

 

 

[P / Y ]

 

100

I%' =

(1+

 

 

) –1

 

⋅ [C / Y ]

￿

100

 

 

 

￿

The following calculation is performed after conversion from the nominal interest rate to the effective interest rate, and the result is used for all subsequent calculations.

i = I%'100kConversion Mode

The Conversion (CNVR) Mode lets you convert between the nominal interest rate (APR) and effective interest rate

(EFF).

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