import pandas as pd
from matplotlib import pyplot
from matplotlib.axes import Axes

df = pd.read_excel("sample-data-food-sales.xlsx", sheet_name="FoodSales")
groups = df.groupby(["Region", "City"])
averages = groups.mean(numeric_only=True)

axis: Axes = averages.plot.bar(rot=0)
for p in axis.patches:
    axis.annotate(f"{p.get_height():.1f}", (p.get_x() + 0.05, p.get_height() + 5), rotation=90)
pyplot.show()