I spent about $120 on some basic components to play around with.
Im sorry to say that, but you wasted your money big time. USB miners are worst and slowest miners out there and are pricy.
You won't turn a profit, for fun you should only buy one... to play with... not couple for so much money.
You won't turn profit in mining, there are really really smart-tech people, with knowledge to do this, money to do this and in right country with cheap energy to do this.
Not everyone can dig up gold, not everyone can mine bitcoins (mine seriously)