25. The total expenditure $E of holding a camp is composed of a $2,000 booking fee for the campsite and a $60 charge for each participant.
A youth club and a school agree to share the total expenditure of holding the camp in the ratio r : 1, and each student who joins the camp will share equally the expenditure of the school.
i) If 200 students join the camp, each has to pay $14. Find the value of r.
ii) Hence, if the school has to pay $12,000 less than the youth club, find the number of students joining the camp.