1) Telling the other "learn to read" is kinda rude. The guy is not a native english speaker (neither am I), so give the guy a break, ok?
2) We run the equipment bussiness at OSI like a company would do. We have a document listing all stuff needed, and the closest place to buy them so the transport pilots know where to go for each item. The price the base buys the items is not the default price (that is used in those calculations you mention), cuz the pilots have to make profits for their runs. So we pay a lot more than the basic price, depending on the distance traveled. On top of that, we pay bonuses for the pilots that haul more. And on top of that we have to make profits for the station at least to mantain itself (a core 4 uses a lot of RA and FOW per day). So, yes, although those mentioned prices are possible, they are only possible when you do it alone, the station buys the commodities at the same price as everywhere, and you do not count in the time flying to get those things. If you try to run it as a bussiness, like we do, those prices are unrealistic.
I hope that clears the subject a little.
Oh, and if you want to buy some stuff from us, with some RP you can get some discounts, mind that too.