lol xD
Don't forget about "fish and chips" = fush and chups or something like that. xD
Yeah, I know what you mean. If everyone around you sounds the same, it just appears natural.
I don't do economics. =\
It's hard... ish. Just depends on how much work you want to put into it really, because it's really easy to only pass it.
It's um... based on analyzing data and how well it fits a model trendline. So not very logical at all.