Hi tutors, I have problem with b

Joshua sells short 3,200 shares of Wild Ride Ltd. when it is trading at $26.00. The margin requirement for Wild Ride is 30% and Joshua contributes the minimum necessary to his account. The shares drop to $11.00 and Joshua covers his short. a. How much did Joshua's account increase in value by, before interest and commissions? (2 marks) 48000 b. AssumeJoshua did not cover his short and Wild Ride began trading upwards. The shares climb all the way up to $28.60 with Joshua contributing the required minimum margin each day. How much margin will now be in his account? (3 marks) 27456