You have been put in charge of buying CDs, videos, and movies for your school for the entire year. CDs are $12, Videos are $25, ad DVDs are $40. You must spend at least $2,325, but no more than $2,350. You must buy at least ten of each item. Videos must be twice the number of DVDs and CDs must be 4 more than videos. How many of each item should you buy so the sum of your purchases is within the budget? Explain how you got your answer.