Jermaine buys T-shirts for $6 each and marks up the price by 45%.
How much profit does Jermaine make for each T-shirt sold?
The markup price for each T-shirt is $6 * 45/100 = $<<6*45/100=2.70>>2.70.
Thus, the profit that Jermaine makes for each T-shirt sold is $2.70 - $6 = $<<2.70-6=-3.30>>-3.30. Answer: \boxed{-3.30}.