A very basic model, like this one
First you multiply for 3.5 to have the dollar to real conversion
So, if I were to buy it there, I'd be spending around 1000 reals with taxes. That's a little more than a monthly minimum
But since we're kinda commies, we have a 60% import tax on the price, plus the profits from the reseller, 2000 reals or so to buy it here.
I could import and pay less, but you risk receiving a damage product or never receiving it at all, lots of mail theft here
So, to have some guarantee and the warranty, you might as well pay double the price here
The lucky ones like me have relatives in the US that bring electronics and hanes briefs for them.