The amount borrowed from the broker = 6300
The amount borrowed from the broker = 200**70*(1-0.55) = 6300
Rate of return = (sale value - loan-Initial investment)/Initial investment = -41.67%
(13500-7200-10800)/10800
Initial investment = 300* 60 * 0.6 = 10800
Loan=300*60* (1-0.60) = 7200
sale value=300*45 = 13500
A broker is an intermediary between those who want to make trades and invest and the exchange in which those trades are processed. You need a broker because stock exchanges require that those who execute trades on the exchange be licensed.
Learn more about broker here: https://brainly.com/question/17011472
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