Total revenue from daily ticket sales to a theme park is $1 352 400. A total of 12 000 tickets were sold and 65% of these were child's tickets with a 30% discount off the adult price. Work out the cost of an adult ticket. The cost of a computer is $6000 including 20% sales tax. In a generous gesture, the government decides to reduce the rate to just 17.5%. Find the cost of the computer after the tax has changed.