Order Profitability Report
You can find out how profitable your orders have been within specified date ranges using this report.
First of all, add your product/option costs to each product for this to work out the profitability, otherwise it will simply be an order summary list. You do this via Product Manager > select product > edit the cost field on the Main tab > edit the cost field on the Options tab.
To run this report go to Reports > Order Profitability Report
Discounts are taken into account and VAT is stripped out of the calculation automatically.
IMPORTANT NOTE: This will collect data from the date of release onwards (i.e. 18th February 2016), it will not report historically because it is using new cost fields held on the order record.