During the Chinese New Year, my grandparents gave me a lucky money of 500 yuan, and the lucky money my grandmother gave me multiplied by 5 was as much as my grandparents gave me. How much did my grandparents give me?

(2) When the Spring Festival comes, my relatives give me lucky money, and my third aunt is at 200 yuan. If I use this 80 yuan to buy toy transformers, how many can I buy? Is there any money left? How much is left?

(3) When the winter vacation arrived, my mother accompanied me to the bookstore to buy books. I chose an Education of Love 12 yuan, and another encyclopedia of dinosaurs, which cost three times as much as Education of Love. My mother said, "Well, let's buy two books, one for you and the other for your cousin as New Year gifts." So, how much did we spend on books?