"""Exercise 7.2.1 — Saving up for a bike

Chapter 7: Operators — Everyday Programming

A bike costs $240 and you start with $60, then add $45 each of two
weeks. This program should print your savings, which is 150.

This program contains exactly one bug. Solution: sol_7_2_1.py
"""

savings = 60
savings = 45
savings += 45
print(savings)   # expected: 150