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BUS 104 Introduction to Computational Thinking
Lab Assignment #4
Spring 2021
This assignment must be turned into Canvas before midnight on the day of your lab session. You may
help each other and work together, but it is imperative that you do your own work. Remember that not
only is academic dishonesty a serious, punishable offense, but you are also bound by the Code of Love
and Honor. Do not cheat.
PROBLEM DESCRIPTION
When developing a capital budget, an organization typically evaluates a number of alternative projects.
In this lab you will expand your Net Present Value calculator to evaluate multiple projects. The program
will calculate and display the NPV of each project. The program will also inform the user of the best
project to implement based on the highest calculated Net Present Value for all project options.
As a reminder, the formula for the net present value calculation is shown below:
𝑁𝑃𝑉 is the net present value, n is the final time period, t is the time period being evaluated,
𝐶𝐹𝑡
is the cash flow at time period t, and k is the cost of capital
The following two projects will be evaluated using the new program as a test case.
WHAT YOU NEED TO DO
Write a lab program to add the following features to your Net Present Value calculator:
 An outer loop to allow the user to evaluate multiple projects. After each project is evaluated,
the program will ask the user if they would like to calculate the NPV for another project. The
loop will end when the user enters a negative response to that question. Make sure your
program clearly tells the user what they must enter to end the outer loop. Even though the test
case has only two projects, the program should accept any number of projects.
 Before each project is evaluated, the user will be asked to input the name of the project, the
cost of capital, and the time periods. The cost of capital and time periods cannot be hardcoded
like they were in the homework, since they may vary by project. Make sure your program
clearly tells the user how the cost of capital and time period should be entered. Will cost of
capital be entered as a whole percentage (and then divided by 100), or as a decimal? Should the
user enter the number of the last time period or the total time periods for the project? That will
affect the subsequent calculations.
 The loop evaluating each program will be similar to the homework. The cash flow entries,
output of the present value at each time period, and output of the net present value of each
project will be similar to the homework.
 The program will no longer recommend acceptance or rejection for each project. Instead, two
variables should be initialized before the outer loop begins to track the best project’s name and
the best net present value. (Hint: Initialize the best project’s name to something like none and
the best net present value to 0.) After each project’s net present value is calculated, determine
if it’s better than the best net present value calculated so far. If it is, update the best project’s
name variable and the best net present value variable to the information for the current project.
 After all projects are evaluated the program should print out the name of the best project for
the firm to include in their capital budget. Using the test case for this lab, the recommendation
would be to choose project X-Ray.
Remember, before you submit, to write a short “preamble” for your program—a few sentences in a
block comment with your name and section that broadly describe the function and purpose of the
program. Also, check that you have included sufficient inline comments and that you have tested and
saved your final version before submitting the web page URL.
On the next page is an example of the dialog between the user and the program when running the test
case.
This program will calculate the Net Present Value of multiple investment
options.
What is the name of the project to be evaluated? Delta
What is the cost of capital as a decimal? 0.04
What is the final time period? 3
Enter the cash flow information for project Delta:
What is the cash flow at time period 0? -10000.75
The present value of cash flow 0 is: $-10001
What is the cash flow at time period 1? 3500
The present value of cash flow 1 is: $3365
What is the cash flow at time period 2? 3500
The present value of cash flow 2 is: $3236
What is the cash flow at time period 3? 3500
The present value of cash flow 3 is: $3111
The Net Present Value of project Delta is: $-288
Would you like to evaluate another project (Y, N)? Y
What is the name of the project to be evaluated? X-Ray
What is the cost of capital as a decimal? 0.08
What is the final time period? 4
Enter the cash flow information for project X-Ray:
What is the cash flow at time period 0? -10000.75
The present value of cash flow 0 is: $-10001
What is the cash flow at time period 1? 5500
The present value of cash flow 1 is: $5093
What is the cash flow at time period 2? 3000
The present value of cash flow 2 is: $2572
What is the cash flow at time period 3? 3000
The present value of cash flow 3 is: $2381
What is the cash flow at time period 4? 1000
The present value of cash flow 4 is: $735
The Net Present Value of project X-Ray is: $780
Would you like to evaluate another project (Y, N)? N
The firm should choose project X-Ray.

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