PL/SQL :: Get Particular Value From Column Which Is BLOB Datatype?

on this query. I need to get a particular value from a column which is a BLOB datatype. Here is the sample

data ID                           TESTDATA1                            Best Buy
00001234 12222 30 00 2                           
Lowes 00001234 12222 100 00 3                           
Walmart 00001234 12222 129 00 4                           
abc 00001234 12222 5000 00 5                           
Toshiba 00001234 12222 21 00 6                           
abcdefghij 00001234 12222 49 00  

Where '00001234' is the Invoice , '12222' is Netamount field and highlighted in red is the $ amount for that invoice.

The only data i need query to return 12222 (netamount)= $amount. I tried using substr  select substr((TESTDATA),19,26)test from TABLEA; But this gives me the only the first row but not other amount which have different positions.

Here is the desired output

OutputID                            TESTDATA 1                          
12222 30 2                            12222 100 3                           
12222 129 4                            12222 5000 5                           
12222 21 6                            12222 49