PLEASE HELP!! I need to figure out m∠2 and m∠4! If you could include steps it would help a lot! I would like to know how to do it myself.

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?