iPhone/iPad Heads-down Data Entry Screen

I need a simple heads-down data entry screen. There will be two text boxes on the top of the screen: txtItemNumber (6-digits) and txtQuantity (3 digits). There will also be a table view with two columns: one for item number and one for quantity. The screen should allow the user to enter a 6 digit number in a text box and when they hit enter it updates the table view grid with quantity of 1. The focus then goes to the quantity text box. If the user enters a number into the text box and hits enter, the table view grid quantity for that item is updated with the quantity in the text box and focus goes back to the Item text box. Project should be done in Xcode v4.2 with iOS 5. This is one screen of a complete iPhone/iPad application. Other screens will be needed at a later date and will be entered as different projects.