Hi, I am running into an issue. I cannot figure out the answer for this question :

If an investor can earn 20 percent on underpriced IPOs, but will lose 10 percent on overpriced IPOs in which he was awarded $2,000 worth of the overpriced issue, how much of the underpriced issue must he be awarded in order to gain $500?

a) 1,500

b) 2,500

c) 3,500

d) 10,000

Thanks in advance