Summarize records with LINQ grouping

using System;
using System.Linq;

// Immutable row type: records give value equality and easy printing.
public record Order(string Region, int Quantity, decimal Price);

/// <summary>Groups orders by region and prints a compact revenue report.</summary>
public static class OrderReport
{
    public static void Main()
    {
        Order[] orders =
        {
            new("North", 2, 9.99m),
            new("South", 5, 4.50m),
            new("North", 1, 19.00m),
            new("South", 3, 7.25m),
        };

        var report = orders
            .Where(o => o.Quantity > 0)
            .GroupBy(o => o.Region)
            .Select(g => new
            {
                Region = g.Key,
                Orders = g.Count(),
                Units = g.Sum(o => o.Quantity),
                Revenue = g.Sum(o => o.Quantity * o.Price)
            })
            .OrderByDescending(row => row.Revenue);

        foreach (var row in report)
        {
            Console.WriteLine($"{row.Region,-8} {row.Orders,3} orders, revenue {row.Revenue:C}");
        }
    }
}