Item-Shipping-Calculator-program

It is s calculator that determines shipping cost. This program is not case senstive. The program contains four destinations, USA, Canada, Austrilia and Jupiter. However, it needs user to confirm twice when they choose Jupiter. Also, there are four different shipping fee charging range based on price of the item. For instance, no greater than 50 dollars, between $50 and $100, between $100 and $150, greater than $150. If the item is fragile, it needs to be charged extra $2. The input for this question has to be valid "y" or "n". Otherwise, the program will stop execute and exit. The shipping record, including item name, shipping cost, destination and total cost, will be present on the both console and a file named "Oder.txt".