Referencing a Column in the same table

Keeps telling me that I’m referencing SubTotal and I’m not sure how to fix that.

The error message I’m getting is "Column CHECK constraint for column ‘Total’ references another column, table ‘Job’."

Create Table Job(     JobNumber int not null         Identity (1,1)         Constraint PK_Job primary key clustered,     Date datetime not null,     Address varchar(100) not null,     City varchar(50) not null,     Province char(2) not null         Constraint CK_Province Check (Province like '[A-Z][A-Z]'),     PostalCode char(7) not null         Constraint CK_PostalCode Check (PostalCode like '[A-Z][0-9][A-Z][0-9][A-Z][0-9]'),     SubTotal money not null,     GST money not null,     Total money not null         Constraint CK_Total Check (Total>SubTotal),               /*COME BACK TO THIS */     ClientID int not null         Constraint FK_JobToClient references Client(ClientID),     StaffID int not null         Constraint FK_JobToStaff references Staff(StaffID), )