Extracting Functions

When you see repeated patterns, extract them into functions:

Before (Repeated Code)

# Calculate discounted prices
price1 = 100
discount1 = price1 * 0.1
final1 = price1 - discount1
price2 = 200
discount2 = price2 * 0.1
final2 = price2 - discount2

After (With Function)

def apply_discount(price, rate=0.1):
    return price - (price * rate)
final1 = apply_discount(100)
final2 = apply_discount(200)

Your Task

The starter code calculates totals with tax repetitively. Create a function calculate_with_tax and use it to simplify the code.