Then you should connect to the connector of trade station which is marked with LCD displays with inscription “TRADE”.
To be able to connect to the connector of trade station u need to make sure that connector of yours ship has changed ownership to “ALL”. When connectors will light up with yellow color, just press “P” to block them. If connections color was changed to green you are ready to trade.
Move your ingots to “Trader” and buy credits.
Then move credits that you already buy to the same place that you put ingots.
Go to the “Production”. Now you can buy ingots with your credits. There is also an option to buy ingots of every resources with Rebelium (This currency also cost money). If you make mistake, there is an option to refund it back to “Trader”. But sales are cheaper than buying. So keep it in mind, and think twice what you are buying. After exchange don’t forget to move ingots to you cargo containers.