To view a detailed report with your Budget break down, click the "Reports" tab, then from the Overview page, in the Budget Spent section, click the "View Full Report" link to view details on your Budget. 

Your Budget report shows the summary of your budget spent for the current billing cycle as well as how much you spent in the previous billing cycle and when you will be billed again for your subscription fee.

It also provides a breakdown of budget consumed by day and budget details that include the total amount spent and how many clicks or leads were received.