Programming Exercise 3-12
# Named constants
RETAIL_PRICE = 99
# Local variables
quantity = 0
fullPrice = 0.0
discountRate = 0.0
discountAmount = 0.0
totalAmount = 0.0
# Get number
quantity = int(input(‘Enter the number of packages purchased: ‘))
# Calculate the discount rate
if quantity > 99:
discountRate = 0.40
elif quantity > 49:
discountRate = 0.30
elif quantity > 19:
discountRate = 0.20
elif quantity > 9:
discountRate = 0.10
else:
discountRate = 0
# Calculate the full price
fullPrice = quantity * RETAIL_PRICE
# Calculate the discount amount
discountAmount = fullPrice * discountRate
# Calculate the total amount
totalAmount = fullPrice – discountAmount
# Print results
print (‘Discount Amount: $’, format(discountAmount, ‘.2f’))
print (‘Total Amount: $’, format(totalAmount, ‘.2f’))