\[ \begin{align}\begin{aligned}\newcommand\blank{~\underline{\hspace{1.2cm}}~}\\% Bold symbols (vectors) \newcommand\bs[1]{\mathbf{#1}}\\% Poor man's siunitx \newcommand\unit[1]{\mathrm{#1}} \newcommand\num[1]{#1} \newcommand\qty[2]{#1~\unit{#2}}\\\newcommand\per{/} \newcommand\squared{{}^2} % % Scale \newcommand\milli{\unit{m}} \newcommand\centi{\unit{c}} \newcommand\kilo{\unit{k}} \newcommand\mega{\unit{M}} % % Angle \newcommand\radian{\unit{rad}} \newcommand\degree{\unit{{}^\circ}} % % Time \newcommand\second{\unit{s}} % % Distance \newcommand\meter{\unit{m}} \newcommand\m{\meter} \newcommand\inch{\unit{in}} \newcommand\feet{\unit{ft}} \newcommand\mile{\unit{mi}} \newcommand\mi{\mile} % % Volume \newcommand\gallon{\unit{gal}} % % Mass \newcommand\gram{\unit{g}} \newcommand\g{\gram} % % Frequency \newcommand\hertz{\unit{Hz}} \newcommand\rpm{\unit{rpm}} % % Voltage \newcommand\volt{\unit{V}} \newcommand\V{\volt} \newcommand\millivolt{\milli\volt} \newcommand\mV{\milli\volt} \newcommand\kilovolt{\kilo\volt} \newcommand\kV{\kilo\volt} % % Current \newcommand\ampere{\unit{A}} \newcommand\A{\ampere} \newcommand\milliampereA{\milli\ampere} \newcommand\mA{\milli\ampere} \newcommand\kiloampereA{\kilo\ampere} \newcommand\kA{\kilo\ampere} % % Resistance \newcommand\ohm{\Omega} \newcommand\milliohm{\milli\ohm} \newcommand\kiloohm{\kilo\ohm} % correct SI spelling \newcommand\kilohm{\kilo\ohm} % "American" spelling used in siunitx \newcommand\megaohm{\mega\ohm} % correct SI spelling \newcommand\megohm{\mega\ohm} % "American" spelling used in siunitx % % Inductance \newcommand\henry{\unit{H}} \newcommand\H{\henry} \newcommand\millihenry{\milli\henry} \newcommand\mH{\milli\henry} % % Temperature \newcommand\celsius{\unit{^{\circ}C}} \newcommand\C{\unit{\celsius}} \newcommand\fahrenheit{\unit{^{\circ}F}} \newcommand\F{\unit{\fahrenheit}} \newcommand\kelvin{\unit{\K}} \newcommand\K{\unit{\kelvin}}\\% Power \newcommand\watt{\unit{W}} \newcommand\W{\watt} \newcommand\milliwatt{\milli\watt} \newcommand\mW{\milli\watt} \newcommand\kilowatt{\kilo\watt} \newcommand\kW{\kilo\watt} % % Torque \newcommand\ozin{\unit{oz}\text{-}\unit{in}} \newcommand\newtonmeter{\unit{N\text{-}m}}\end{aligned}\end{align} \]

Apr 16, 2025 | 236 words | 2 min read

10.2.1. Monthly Sales

Write a Python program that collects monthly sales data from the user and stores it in a list. The program should then use matplotlib to plot the sales values as a pie chart. When plotting, specify the color of the pie slices using Purdue’s retired secondary color palette shown in Table 10.1. The pie chart should include a title (replacing login with your Purdue login), and every slice in the chart should be labeled with the name of the month it represents.

Table 10.1 Purdue’s Secondary Colors

Color Name	Hex-Code
EverTrueBlue	\(5\text{B}6870\)
SlayterSkyBlue	\(6\text{E}99\text{B}4\)
AmeliaSkyBlue	\(\text{A}3\text{D}6\text{D}7\)
LandGrantGreen	\(085\text{C}11\)
RossAdeGreen	\(849\text{E}2\text{A}\)
CeleryBogGreen	\(\text{C}3\text{BE}0\text{B}\)
SpringFestGreen	\(\text{E}9\text{E}45\text{B}\)
OakenBucketBrown	\(6\text{B}4536\)
BellTowerBrick	\(\text{B}46012\)
MackeyOrange	\(\text{FF}9\text{B}1\text{A}\)
YellowWalk	\(\text{FFD}100\)
FountainRunTeal	\(29\text{A}592\)

Sample Output

Save the resulting figure as monthly_sales_login.pdf and save your Python program as monthly_sales_login.py, where login is your Purdue login. Then submit both of them along with a screenshot of a run of your program using the test data.

Use the values in Table 10.2 below to test your program.

Table 10.2 Test Cases

Case	Jan	Feb	Mar	Apr	May	Jun	July	Aug	Sept	Oct	Nov	Dec
1	4000	2000	5000	3000	4000	6000	5000	2800	5000	8000	7000	9000

Ensure your program’s output matches the provided samples exactly. This includes all characters, white space, and punctuation. In the samples, user input is highlighted like this for clarity, but your program should not highlight user input in this way.

Case 1 Sample Output

$ python3 monthly_sales_login.py Enter the sales for Jan: 4000 Enter the sales for Feb: 2000 Enter the sales for Mar: 5000 Enter the sales for Apr: 3000 Enter the sales for May: 4000 Enter the sales for Jun: 6000 Enter the sales for Jul: 5000 Enter the sales for Aug: 2800 Enter the sales for Sep: 5000 Enter the sales for Oct: 8000 Enter the sales for Nov: 7000 Enter the sales for Dec: 9000

Fig. 10.3 Case_1_monthly_sales.png

Deliverables

Save your finished program as monthly_sales_login.py, replacing login with your Purdue login. Then submit it along with all the deliverables listed in Table 10.3 below.

Table 10.3 Deliverables

Deliverable	Description
monthly_sales_login.py	Your finished program.
Screenshot(s)	PNG(s) capturing the test case.
monthly_sales_login.pdf	Your formatted .pdf file