Consider the all-units quantity discount schedule below.

Price Bracket	Quantity Ordered	Price Per Unit	Total Annual Cost (Optimal)
1	1-1999	$100	306,333
2	2000-3999	$90	314,289
3	4000-5999	$80	321,113
4	6000-7999	$70	326,814
5	8000+	$60	350,754

Based on the Total Annual Costs given above (assume they are following the optimal policy for that price bracket), which Price Bracket provides the best balance between holding, ordering, and purchasing costs? Enter your choice (a number between 1 and 5 inclusive) into the blank below.