Independent solution

How to solve this Loan Balances and Amortization question

Setup

Setup

Use the first payment and resulting balance to infer the monthly interest rate.

50000(1+j)800=4980050000(1+j)-800=49800
j=0.01200000j=0.01200000

Model

Model

Solve the level-payment annuity term at the recovered monthly rate.

50000=800an0.01250000=800a_{\overline n|0.012}

Compute

Compute

The exact term is 116.216299. Because it is not an integer, the final drop payment occurs at the next payment number, 117.

N=116.21629923=117N=\lceil116.21629923\rceil=117

Answer

Answer

The loan is retired with payment 117, selecting choice B.

N=117(B)\boxed{N=117\quad\text{(B)}}

Calculator reproduction

BA II Plus keystrokes

Check END/BGN, period, sign, TVM, and cash-flow setup

  1. 2ND · CLR TVM · 1.2 · I/Y · 50000 · +/- · PV · 800 · PMT · 0 · FV · CPT · NN = 116.22Round up to include the final drop payment.