Format two decimal places. Remove the SQL statement from Saturday and use the memory stream for deep copy.

Code
Two decimal places
M. tostring ("0.00 "));

-- Remove Sunday when the date is subtracted, and get the date minus days
Declare @ x datetime, @ Y datetime
Set @ x = '2017-7-1'
Set @ Y = '2017-7-31'
Set datefirst 1
If datepart (DW, @ X) <> 7
Begin
Select datediff (day, @ X, @ Y)-datediff (Week, @ X, @ Y)
End
Else
Begin
Select datediff (day, @ X, @ Y)-datediff (Week, @ X, @ Y)-1
End

The memory stream is used for deep copy, but [serializable] must be added to OBJ.
Public static object deepcopy (Object OBJ)
{
Memorystream MS = new memorystream ();
Binaryformatter BF = new binaryformatter ();
BF. serialize (MS, OBJ );
 
Object retval;
Ms. Seek (0, seekorigin. Begin );
Retval = BF. deserialize (MS );
Ms. Close ();
Return retval;
}