Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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![### Investment Recovery and Discounted Payback Period Calculation
**Problem Statement:**
If a project costs $90,000 and is expected to return $24,500 annually, how long does it take to recover the initial investment? What would be the discounted payback period at \(i = 15\%\)? Assume that the cash flows occur continuously throughout the year.
---
**Calculation Requirements:**
1. **Determine Payback Period:**
- **Formula:** The payback period is calculated by dividing the initial investment by the annual return.
- **Input:**
- Initial investment: $90,000
- Annual return: $24,500
- **Output:**
- Payback period in years (rounded to one decimal place)
2. **Calculate Discounted Payback Period:**
- **Formula:** The discounted payback period considers the present value of future cash flows. Each yearly return must be discounted at the rate of 15%.
- **Assumptions:** Cash flows occur continuously throughout the year.
- **Input:**
- Annual return: $24,500
- Discount rate: 15%
- **Output:**
- Discounted payback period in years (rounded to one decimal place)
---
**Solution Process:**
*Firstly, compute the regular payback period:*
\[ \text{Payback Period} = \frac{\text{Initial Investment}}{\text{Annual Return}} \]
\[ \text{Payback Period} = \frac{90,000}{24,500} \]
\[ \text{Payback Period} \approx 3.7 \text{ years} \]
*Next, compute the discounted payback period:*
Since cash flows are continuous, we will integrate the present value of returns until the total equals the initial investment:
\[ \int_0^T 24,500 e^{-0.15t} \, dt = 90,000 \]
Solving this integral-based equation will provide the discounted payback period:
\[ \int_0^T 24500 e^{-0.15t} \, dt = \left[ \frac{24,500}{-0.15} e^{-0.15t} \right]_0^T = -163,333.33 (e^{-0.15T} - 1) \]
Set and solve it for \(T\):
\[](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fffda4bf9-862c-42b1-95a1-37b9829521a1%2Fbd5e8af9-7206-488a-9306-3c15012c4770%2Fc7mflj0h_processed.png&w=3840&q=75)
Transcribed Image Text:### Investment Recovery and Discounted Payback Period Calculation
**Problem Statement:**
If a project costs $90,000 and is expected to return $24,500 annually, how long does it take to recover the initial investment? What would be the discounted payback period at \(i = 15\%\)? Assume that the cash flows occur continuously throughout the year.
---
**Calculation Requirements:**
1. **Determine Payback Period:**
- **Formula:** The payback period is calculated by dividing the initial investment by the annual return.
- **Input:**
- Initial investment: $90,000
- Annual return: $24,500
- **Output:**
- Payback period in years (rounded to one decimal place)
2. **Calculate Discounted Payback Period:**
- **Formula:** The discounted payback period considers the present value of future cash flows. Each yearly return must be discounted at the rate of 15%.
- **Assumptions:** Cash flows occur continuously throughout the year.
- **Input:**
- Annual return: $24,500
- Discount rate: 15%
- **Output:**
- Discounted payback period in years (rounded to one decimal place)
---
**Solution Process:**
*Firstly, compute the regular payback period:*
\[ \text{Payback Period} = \frac{\text{Initial Investment}}{\text{Annual Return}} \]
\[ \text{Payback Period} = \frac{90,000}{24,500} \]
\[ \text{Payback Period} \approx 3.7 \text{ years} \]
*Next, compute the discounted payback period:*
Since cash flows are continuous, we will integrate the present value of returns until the total equals the initial investment:
\[ \int_0^T 24,500 e^{-0.15t} \, dt = 90,000 \]
Solving this integral-based equation will provide the discounted payback period:
\[ \int_0^T 24500 e^{-0.15t} \, dt = \left[ \frac{24,500}{-0.15} e^{-0.15t} \right]_0^T = -163,333.33 (e^{-0.15T} - 1) \]
Set and solve it for \(T\):
\[
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