To answer Lord Tony's original question: cents on the dollar, that's all it is
They are making a profit (even if very small) or they would not be in business.
Believe me dude I worked in a factory where they make rice cakes and I was trying figure out how the hell they make a profit and pay all their workers $11.30 per hour!
Factories like this usually sell in bulk. They might be selling that mousepad for $3, but it probably costs them less than a dollar to make it (seriously!) so if you think about it they are actually getting one over on the consumer (especially if they have to ship it out)
Hell, I could start selling painted rocks for 10 dollars a rock, all I gotta do is find some nice rocks laying around my yard and buy some acrylic patio paint (cost like 3-5 bucks) and draw some cool design on it