Change values to negatives

I

Iram

Hello.
I would like to create an update query that will change the values to
negative numbers. The values are in currency format. For Example I have
records with $5.00 but I would like to run an update query that will change
the $5.00 to a negative number (5.00).
How would I create the query?

Your help is greatly appreciated.

Iram/mcp
 
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