I think this paragraph from one of the articles that kkards linked to offers a sobering perspective:
"“You have to really think about it when you’re buying something,” Martinez says. “If you’re buying a shirt that’s $7, for example, and you know that the minimum wage is $9, you’re saying this one $7 garment probably took at least 30 minutes to make, plus travel to get here, and there’s a lot of people that worked on that garment.” The numbers really don’t add up. "
I stopped sewing my own clothes when I realized what I was spending on just fabric and notions was almost double the price of a ready-to-wear shirt in a department store. Boycotting a company for unethical practices, though, struck me as rather hypocritical when I willingly pulled out my credit card to buy a $35 jacket, rationalizing the ridiculously low price was because of the store's 60% off sale. I knew that sourcing just the raw materials for a jacket for $35 would be difficult, to say nothing of labour and transportation costs, and, yet, sub-contractors, a manufacturer, a brand, and a retailer were still likely to be making a profit from my $35 purchase. As the quote says, "the numbers just don't add up".