Answer:
3.73 cents
Explanation:
Margin call occurs when the account loses more than $ 560 ($ 1960 - $ 1400).
The change in price that will lead to a margin call = Y cent × 15000 pounds = $ 560
Y cents = $ 560 / 15000 = 3.73 cents
the future price must drop more than 3.73 cents from 136 cents to below 132.3 cents