That means you'll buy 1 ton of gold at Yakabugai for 8236 and sell it at Eravate for 9100. You need to do some minor missions or scavenging before you can afford that sort of cargo, but it won't take long. Just stay away from the big stations so you don't get scanned and fined. Restarting for the sake of 500 credits won't make much difference, to be honest.
Ls (light seconds) is the distance that the station is from the hyperspace jump point. For scale, the distance from Earth to the Sun is about 500 light seconds, but it only takes a minute or so in game.
You can get some really nasty ones, which aren't worth bothering with. One of the first missions I took was to deliver something to Alpha Centauri - I didn't realise the station would be so far away that it took 90 minutes of real time to get there. Just left it going while I made some dinner (and then overshot by 5 minutes and had to turn around).
I've been asking questions over at the Elite Dangerous Forums. I've been told I can sell food as Ackerman is agricultural and that I should be able to sell food to McMahon which is industrial, and then sell stuff from there back to Ackerman.... However I'm lost having no idea where McMahon. Is it in the Eravate System? I've pulled up both the galaxie map and system maps, don't see a McMahon.
Looking on the commodities page for Algae at Ackerman Station it says Sell: 39, Buy 53, Cargo column shows a dot, Deman colum is blank. Over on the right side of the screen it says exported to: Chamunda, Kremainn, Yakabugai, and Potriti. McMahon is not on the list.
Does the above mean that they will sell it to me for 39 a unit, or I have to buy it from them for 53 a unit? Then if I plan on hauling it someplace, how do I know how much they will pay for it there?
Thanks!