SO59303710

.cs

var result = paymentCollections
	.GroupBy(l => 
	{
		switch(l.PaymentStatus)
		{
			case "Status1":
				return "Unit1";
			case "Status2":
			case "Status3":
				return "Unit2";
			case "Status4":
				return "Unit3";
			case "Status5":
			case "Status6":
				return "Unit4";
		}
		return "Unk";
	})
	.Select(cl => new MoneyMovement
	{
		CollectionUnit = cl.Key,
		MoneyCollected = cl.Sum(c => c.Amount).ToString(),
		NoOfReceipt = cl.Count().ToString(),
	}).ToList();