Hi sebastiankjall
To do this How do I get Stock Central to show the total value of the stock, go to ATUM settings > Stock Central > And in 'Products per page' field put -1. In this way, all the products will be display in just one page in Stock Central, so you will be able to see the total value of the stock.
In the other side, in order to export a PDF go to the right top corner in Stock Central, click on Export Data button, and you will be able to Export the data you want.
Hope this helps,
Best Regards,
Andrea.