Accessing dd/mm/yy to calculate the total amount of sales per year?

  analysis, jupyter-notebook, pandas, python

I have a dataset that looks a little bit like the attached screenshot.
Example Dataset

I am trying to calculate the Sales_information per year. But because of the way the Date is layed out I am struggling to find a solution that works. I have tried googling and researching however I am not sure I fully understand the issue I am having, and therefore about 2 hours later I am here typing this.

Source: Python Questions