•The user can enter one ‘1’ and no ‘2’ or  one ‘1’ and one ‘2’ or no ‘1’ and one ‘2’ or no ‘1’ and no ‘2’. Any other combination of entries is invalid.
	•Enter ‘1’ beside an ID and ‘2’ beside another ID and press Enter.  Set these two IDs to ‘1’ and ‘2’, clear all other Budget IDs.
	•Enter ‘1’ beside an ID (no ‘2’) and press Enter:
		•The ID with number ‘2’ becomes unselected, the ID with number ‘1’ becomes number ‘2’ and the selected ID becomes number ‘1’.
		•Enter ‘2’ beside an ID (no ‘1’) and press Enter:
		•Keep ‘1’ as ‘1’ unless it is the selected ID.  In which case, make ‘1’ a ‘2’ and make ‘2’ a ‘1’.   Otherwise, the ID with number ‘2’ becomes unselected.  The selected ID becomes number ‘2’.
		There must be a default number ‘1’ and a default number ‘2’ at all times.