Lost with conversion of nvarchar to decimal and date

I am totally stuggeling with the the conversion from nvarchar datatype to decimal and date.

I extracted data from SAP with SE16 imported the flat file to SQL server. All fields have the datatype nvarchar(50). I now need to change the datatype for the date fields (AUDAT) to a date and NETWR to numeric. Here an extract:

MANDT   AUDAT                      NETWR
010  	02.10.2007	           44,657.60 
010  	02.08.2008	               58.76 
010  	02.11.2007	           11,752.00 
010  	05.10.2007	                0.00 
010  	02.10.2007	              748.16 

For AUDAT I used the following code which seams to work, however changes the date format to yyyy-mm-dd instad of dd.mm.yyyy:

UPDATE VBAK
SET [AUDAT     ] = CONVERT(date, [AUDAT     ],104)

The conversion from NETWR to a decimal datatype doesn't work at all. I always get a "Error converting data type nvarchar to numeric" error:

UPDATE VBAK
SET [NETWR                ] = CONVERT(DECIMAL(10,2),REPLACE(REPLACE([NETWR                ], ',', ''), ',', ','))