Find the simplified expression of revenue from the given data.
A store has been selling 200 DVD players per week at $450 each. A market survey indicates that for each $15 reduction in price, the number of DVD players sold will increase by 10 per week.
i) Write a simplified expression for the weekly revenue.
ii) Construct a table of values and graph the function.
iii) At what price should the store sell the DVD players for maximum revenue?