Math-related operations in Python - Mini Project: Build & Apply

Math-related operations

📖 Scenario: You are helping a small shop owner calculate the total cost of items bought by customers. Each item has a price, and the owner wants to know the total amount to charge.

🎯 Goal: Build a simple Python program that stores item prices, sets a discount threshold, calculates the total price of items above the threshold, and prints the final total.

📋 What You'll Learn

Create a dictionary with item names and their prices

Create a discount threshold variable

Calculate the sum of prices for items with prices above the threshold

Print the total sum

💡 Why This Matters

🌍 Real World

Shop owners and cashiers often need to calculate totals and apply discounts based on price thresholds.

💼 Career

Understanding how to work with data collections and conditions is essential for roles in data entry, retail software, and basic programming tasks.

1

Create the item prices dictionary

Create a dictionary called items with these exact entries: 'apple': 30, 'banana': 10, 'orange': 20, 'mango': 50

Python

# Create the items dictionary with prices
# Your code here

Need a hint?

Use curly braces {} to create a dictionary with key-value pairs.

2

Set the discount threshold

Create a variable called threshold and set it to 20

Python

items = {'apple': 30, 'banana': 10, 'orange': 20, 'mango': 50}
# Set the discount threshold
# Your code here

Need a hint?

Just assign the number 20 to the variable named threshold.

3

Calculate total price above threshold

Create a variable called total and use a for loop with variables item and price to iterate over items.items(). Add price to total only if price is greater than threshold

Python

items = {'apple': 30, 'banana': 10, 'orange': 20, 'mango': 50}
threshold = 20
# Calculate total price of items with price above threshold
# Your code here

Need a hint?

Start total at 0. Use a for loop to check each price. Add price to total only if it is greater than threshold.

4

Print the total price

Write a print statement to display the value of total

Python

items = {'apple': 30, 'banana': 10, 'orange': 20, 'mango': 50}
threshold = 20
total = 0
for item, price in items.items():
    if price > threshold:
        total += price
# Print the total price
# Your code here

Need a hint?

Use print(total) to show the final sum.