Adding Old Sales Data from BigCartel to Wordpress/WooCommerce

I own a small business by the name of TribalCustoms, ([login to view URL]) we are clothing line that has been in operation since 2012. When we first began, we handled all orders exclusively through BigCartel. However, in February 2014, we converted to Wordpress, and began using WooCommerce to track sales data and reports. In looking back on our history, it is difficult to gauge growth because our orders are spread across two platforms. We would like to be able to somehow have old order data inputed into our Wordpress/WooCommerce system. This way we can track sales, product sales, refunds, and see how much our enterprise has grown in one fell swoop. Thusly, the project will entail going into our old BigCartel system. Gathering all the data, and somehow finding a way to input that Data into our current Wordpress Platform. That data includes about 100-200 orders placed from November 2012 to January 2014.