Question - Luke is arranging for a party to be held in the students' union. The use of the hall will be free but security costs of £300 will have to be met. The cost of the main band will be £2,500 and the supporting band will cost £450. Tickets will be priced at £15 each. On arrival, every ticket holder will be given a bottle of water, worth £1 per bottle. What are the total fixed costs for this event?