Automobile Expenses Using Simplified Method

I am self-employed and have maintained a mileage log. I want to use the Simplified Method to enter my automobile expenses (e.g 3000 km @ 59 cents/km).  How do I do this or where do I enter it?  The form T777 has lines for detailed types of expenses but has no where to enter kilometres and a rate.  How do I do this?  Thanks for any help anyone can provide.