HP 12C#ABA hp 12c_solutions handbook_English_E.pdf - Page 153

Savings, periodic payment amount.

Page 153 highlights

• FC = (G - AMT - CL) Rule of 78's Rebate • PV = finance charge. • Ik = interest charged at month k. • n = number of months in loan. • lk= -2---(-n--n--(--n------k+----+-1----)1----)-PV • Rebate= (---n----------k----)--l--k 2 • BALk = (n - k) x PMT - Rebatek Skipped Payments • A = number of payments per year. • B = number of years. • C = annual percentage rate as decimal. • D = periodic payment amount. • E = loan amount. • K = number of last payment before payments close the first time. • L = number of skipped payment. DEND = ---1 1-----+E-----C-A A−----B-----   1 + C-A-- A - 1 C--A 1-----+-----C-A A 1-----+-----C-A A---K 1-----+-----C-A A---K-L 1-−---- DBEGIN = D-----E----N---D-1 + C--- A Savings 152

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152
FC
= (
G
-
AMT
-
CL
)
Rule of 78's Rebate
PV
= finance charge.
I
k
= interest charged at month
k
.
n
= number of months in loan.
BAL
k
= (
n
-
k
) x
PMT
-
Rebate
k
Skipped Payments
A
= number of payments per year.
B
= number of years.
C
= annual percentage rate as decimal.
D
= periodic payment amount.
E
= loan amount.
K
= number of last payment before payments close the first time.
L
= number of skipped payment.
Savings
l
k
2n
k
1
+
(
)
nn
1
+
(
)
------------------------------PV
=
Rebate
n
k
(
)
l
k
2
--------------------
=
D
END
E
1
1
C
A
---
+
AB
------------------------------------------
1
C
A
---
+
A
1
C
A
---
1
C
A
---
+
A
1
C
A
---
+
A
K
1
C
A
---
+
A
L
K
1
+
---------------------------------------------------------------------------------------------------------
×
=
D
BEGIN
D
END
1
C
A
---
+
--------------
=