help please

You are bearish on Telecom and decide to sell short 200 shares that are currently selling at $25 per share. You post the 50% margin required on the short sale. If your broker requires a 35% maintenance margin, at what stock price will you get a margin call? (You earn no interest on the funds in your margin account, and the firm does not pay any dividends.) $27.78 $32.25 $29.50 $28.85