Need to Sum data by Number Format Code

I have a column of data which has been entered as numbers and then formatted to show the relevant currency for that amount.
e.g. [$AUD]#,##0.00 for Australian Dollars; [$EUR]#,##0.00 for Euro; etc.
See the attachment.

I need to determine the total amount for each currency.

The approach I have thought of is to add a "currency" column and then calculate the totals with using the sumif function.

My stumbling block is extracting the currency code from the formatting.
Anyone have an idea on how I can do it with a formula - as I do not fancy having to do 1300 rows by hand!