Draw a waterfall bridge from revenue to profit: one floating bar per step in steps, each starting where the previous one ended (use bottom=), then a final bar Profit from 0 to the total.
import matplotlib.pyplot as plt steps = ["Revenue", "Ad spend", "Returns", "Fixed costs"] values = [7920, -1071, -230, -4800]
Draw the chart. It is checked on what it shows: the data, the title and axis labels, the legend and the category names. Size and fonts don't matter.
Each hint gives a little more help. Try on your own first.
Run your code to see the output here.