Percentage of numbers

1. Roller skates costs 60 dollars. You receive a 10 % as it is on sale. How much are the skates? 


2. A video game cost 40 dollars. On sale they were 15% cheaper, so you bought two games. How much did you pay in total? 



3. A watch costs 150 dollars on the site  and there is a 30% delivery fee . How much is the delivery fee and what is the total cost?


4. Yesterday Anna bought a DVD and a book in the book store. The DVD was $25 and the book was $12. When she went to pay,the cashier told her that there was a 10% discount on the DVD and a 5% on the book.

a.How much was the discount on each item?          
b.What was the total she paid for each item?     
c.What was her total bill on both items?