EF中无需关联对象，如何获取已存储的计算属性？

我正将数据库持久化方案从Dapper迁移至EF。目前，我需要获取Invoice类中已存储在数据库的Total计算属性，但必须通过关联/包含InvoiceItem等相关对象才能实现。请问是否可以仅查询Invoice实体即可获取该Total属性？

示例代码 #

public class Invoice{
  private decimal _total=0;
  public IEnumerable<InvoiceItem> Items{get;set;}
  public decimal Total{
    get=> Items.Sum(x=>x.Total);
    private set=> _total=value;
  }
}
public class InvoiceItem{
    public decimal Total{get;set;}
} 

补充：实际项目中的Invoice实体代码 #

实际项目中，Total属性依赖多张表关联计算得出：

public class Invoice{

    //other properties
    public decimal Total{
    get => CalculateTotal();
    set => _ = value;
    }

private decimal CalculateTotal()
{
    var previousStatementTotal = PreviousStatement?.Total ?? 0;
    var miscChargeTotal = LeaseMiscellaneousChargeInvoice?.Total ?? 0;
    return            
        previousStatementTotal+ 
        RentsInvoice.Sum(x => x.Total) +
        RentsInvoice.Sum(x => x.ValueAddedTaxAfterDiscount) +
        RentsInvoice.Sum(x => x.WitholdingTaxAfterDiscount) +
        miscChargeTotal+
        Utilities.Sum(x => x.Total) +
        Utilities.Sum(x => x.ValueAddedTaxAfterDiscount) +
        DeductionInvoices.Sum(x => x.Amount) +
        OtherCharges.Sum(x => x.Total);
    }
}

问题解决情况 #

我已采用@Steve-Py的建议，问题已解决。

内容的提问来源于stack exchange，提问作者forgetaboutme