Talk:TGV Sud-Est/@comment-78.250.191.57-20140428093604/@comment-5596770-20140428151239

Open the 'Materials' window and it should list all the different materials. Each material should have a $ symbol next to it. If you put your mouse pointer over the $, a tooltip should appear that says 'sell'. Once you click the $, a slider bar appears to help you choose how much of the material you want to sell.