The three numbers you received in the financial email can be calculated using the details on your Dashboard. Here's how:
Net income - This can be found on your Earnings Dashboard when looking at Creator's Share. You'll need to add up all the creator share lines from 2017 (you can also download the CSV to make this a quick process.)
Refunds - This can be found on your Refund Dashboard when looking at the Deduction from Creator Balance column.
Gross earnings - This your Net income and Refund totals combined.