2nd loop combined the first and second statement lines...why?

I wrote this program to calculate the price. I want to have users to enter the item name and price continuesly, then once the hit 'f', it will give them the total. I was able to enter the first item and price but then the second time around, this is what show on my screen:

Item to purchase (enter F when finished): price for this is:

It combined the first and second lines in one line. I can't figure out why.

Please help.

This is part of my code below:

for (;;)

{

String F ="F";

System.out.print("Item to purchase (enter F when finished): ");

item=sc.nextLine();

if(item.equalsIgnoreCase (F))break;

System.out.print("Price of this "+ item +" is: ");

price=sc.nextDouble();

[756 byte] By [aivon1sta] at [2007-11-27 7:54:44]