You are bearish on Telecom and decide to sell short $140$ shares at the current market price of $$60$ per share.

Required:

How much in cash or securities must you put into your brokerage account if the broker's initial margin requirement is $50\%$ of the value of the short position?

How high can the price of the stock go before you get a margin call if the maintenance margin is $30\%$ of the value of the short position?