You purchased $100$ shares of XYZ on margin at $$614$ per share. Assume the initial margin is $50\%$ and the stock pays no dividend. What's the equity value $($$$)$ in your account when the stock price falls to $$600?$ Hint: Dollar value, not percentage margin.

What would the maintenance margin $(\%)$ be if a margin call is made at a stock price of $$500?$ Ignore interest on margin. Hint: An integer number between $0$ and $100.$