Based on the kind of costs they are, Nathan would assign them to the following sections of economic order quantity:
The cost of storing milk would go to the Annual holding cost because this is where storage costs are catered for. Economic Order Quantity aims to minimize storage costs so these must be accounted for.
Insurance expenses are fixed costs which means that they will go to the fixed cost the company incurs for every order they make.
Find out more on Economic Order Quantity at https://brainly.com/question/13386271.