quarters = ['Q1', 'Q2', 'Q3', 'Q4']
sales_2019 = [155000, 150000, 160000, 160357]
sales_2020 = [123484, 41594, 106888, 150958]

plt.figure(figsize=(10, 6))
plt.plot(quarters, sales_2019, marker='o', label='2019')
plt.plot(quarters, sales_2020, marker='o', label='2020')
plt.title('Quarterly Sales Comparison: 2019 vs 2020')
plt.xlabel('Quarter')
plt.ylabel('Units Sold')
plt.legend()
plt.grid(True)
plt.show()