Dependence on services

I have a service that closes an entry in stock. Like all entry process to register the note I have the manual register of each item of the note and when closing the note I need to update the inventory of each item of this note.

I've done the following method in my service:

public class EstoqueEntradaService : BaseService<SAR_ENTRADA> 
{
    public void FecharEntrada(SAR_ENTRADA model)
    {
        model.Status = 'F';

        foreach (var item in model.Entradas)
        {
            var estoque = item.Material.Estoque.Where(m => m.Almoxarifado == item.Almoxarifado).SingleOrDefault();

            if (estoque != null)
            {
                estoque.Quantidade += item.Quantidade;
            }
            else
            {
                item.Material.Estoque.Add(new Estoque()
                {
                    Almoxarifado = item.Almoxarifado,
                    Material = item.Material,
                    Quantidade = item.Quantidade
                });
            }

            item.Material.CustoMedio = (item.Material.CustoMedio + item.ValorUnitario) / 2;
            item.Material.UltimoValorCompra = item.ValorUnitario;
            item.Material.UltimaDataCompra = DateTime.Now;
            item.Material.Fornecedor = model.Credor;
        }

        this.Edit(model);
    }
}

In the process of closing the entry I change the status to closed and I make a list of each item of this entry updating the stock, if it exists or inserting a new record in my stock for that product, by warehouse.

My question is: Should I keep this inventory update part within a service that refers to the input and not the inventory items or should I in that input service call the inventory service in a method for example: UpdateStack, which receives the ID of the warehouse and the material and then yes update the inventory there?

Vlw!