Need to use Ruby to love this

At Serendipity Booksellers, some books can be purchased in bulk at a discount as determined by the table below. Write a program that asks the user how many books to purchase. If the user | provides a value less than 10, no discounts apply. Inform the user and Quantity Discount P end. If the user enters a value of 0 or less, have the program inform him 10 - 19 20% that the value is invalid and end. Otherwise, have the program ask for 20 49 30% the price of a single book. Then, using the table above, have the 50 - 99 40% program display the discount percentage. Have the program calculate and display the cost if no discount were applied, the actual amount of 100+ money saved, and the cost after applying the discount. 50%