Convert Varchar To Money Type

I write using the SQL ODBC driver from software into a SLQ table called UPSSHIPMENT the format is as followed:
JobNumber varchar 50
Weight real 4
FreightCost varchar 8
TrackingNumber varchar 50
Shipmethod varchar 50
VOIDID varchar 3

I then have a trigger set to update the PACKAGE table as followed
CREATE TRIGGER [UPS] ON dbo.UPSSHIPMENT
FOR INSERT

AS

BEGIN
UPDATE PACKAGE
SET WEIGHT = inserted.WEIGHT,
FREIGHTCOST = inserted.FREIGHTCOST,
TRACKINGNUMBER = inserted.TRACKINGNUMBER,
COMMENTS = inserted.SHIPMETHOD
FROM PACKAGE
INNER JOIN inserted on PACKAGE.JOBNUMBER = inserted.JOBNUMBER
WHERE inserted.VOIDID = 'N'

UPDATE PACKAGE
SET WEIGHT = '',
FREIGHTCOST = '0.00',
TRACKINGNUMBER = '',
COMMENTS = 'UPS VOID'
FROM PACKAGE
INNER JOIN inserted on PACKAGE.JOBNUMBER = inserted.JOBNUMBER
WHERE inserted.VOIDID = 'Y'

END

The format of the PACKAGE table is as followed
Jobnumber varchar 50
FreightCost money 8
TrackingNumber varchar 50
Comments varchar 2000
Weight real 4

I am getting the following error
---------------------------
Microsoft SQL-DMO (ODBC SQLState: 42000)
---------------------------
Error 260: Disallowed implicit conversion from data type varchar to data type money, table 'TESTing.dbo.Package', column 'FreightCost'. Use the CONVERT function to run this query.
---------------------------
OK
---------------------------

How do you use the convert function to change the data before the update? Thank You!
:mad: