Print-shop prices and comparison

At a print shop, \(2\) bindings and \(30\) colour pages cost \(\$25\), while \(3\) bindings and \(20\) colour pages also cost \(\$25\).

1. Let \(b\) dollars be the price of one binding and \(c\) dollars be the price of one colour page.
   1. Form two equations connecting \(b\) and \(c\).
   2. Hence, solve the equations obtained in (a)(i) to find the price of each item.
2. An order contains \(4\) bindings and \(50\) colour pages. The customer may choose either a \(12\)% discount on the whole order or a \(\$5\) voucher. Which option saves more, and by how much? Explain your answer.