Java SE program

ask the user to enter the sales amount, if it is greater than $1000, the customer gets 17%, if greater than 700, gets 13%, if greater than 400 gets 9% other wise no discount. The program should calculate the amount that customer pays, make sure to add tax after the discount applied. ask if the user wants to continue with another customer (use while and keep var). also validate the sales amount that is greater than 0 (0 and negative should be rejected and the user can re-enter)