Monthly Payment B5Efec
1. **State the problem:** Calculate the monthly payment on a $62000 business loan with an annual interest rate of 5.46% over 20 years, compounded monthly.
2. **Formula used:** The Excel PMT function calculates the payment for a loan based on constant payments and a constant interest rate:
$$\text{PMT} = \frac{r \times PV}{1 - (1 + r)^{-n}}$$
where:
- $r$ is the monthly interest rate (annual rate divided by 12),
- $PV$ is the present value or loan amount,
- $n$ is the total number of payments (months).
3. **Calculate monthly interest rate:**
$$r = \frac{5.46}{100 \times 12} = 0.00455$$
4. **Calculate total number of payments:**
$$n = 20 \times 12 = 240$$
5. **Substitute values into the formula:**
$$\text{PMT} = \frac{0.00455 \times 62000}{1 - (1 + 0.00455)^{-240}}$$
6. **Calculate denominator:**
$$1 - (1 + 0.00455)^{-240} = 1 - (1.00455)^{-240}$$
Calculate $(1.00455)^{-240}$:
$$ (1.00455)^{240} \approx 3.030 $$
So,
$$ (1.00455)^{-240} = \frac{1}{3.030} \approx 0.330 $$
Therefore,
$$1 - 0.330 = 0.670$$
7. **Calculate numerator:**
$$0.00455 \times 62000 = 282.1$$
8. **Calculate monthly payment:**
$$\text{PMT} = \frac{282.1}{0.670} \approx 421.04$$
**Final answer:** The monthly payment is approximately 421.04.