Answer:
The sentence uses an active voice
In this case active voice is not appropriate
Explanation:
Mode of expression can be passive or active.
Passive voice is one that emphasises the subject or person that is receiving an action.
An active voice describes a person that is performing an action.
In this scenario Jake accidentally input $560 instead of $650 on one of the invoices. The writer hasn't contacted you about the error yet.
So the email sent should just focus on what has happened to the writer and also to proffer a solution to the problem.
Since the writer did not complain or request for information on who made the mistake, stating that it was Jake that made the error is inappropriate.
A better statement would have been - An error was made on your invoice where the figure was inputted as $560 instead of $650. This however has been rectified and the invoice forwarded to you.