Its got to be your fuel charges and an hours labour at least.
Why couldnt the person bring it to you ?
If he was insisiting you took it to him then really you should get something for your travel time.
But it would be unfair for you to charge a full hourly rate for sitting in the car listening to the radio.... but in saying that its still half a day out of your life.
If this person is a 'mate' then Fuel charges plus a 'drink'
If the person is just a customer and you have no relationship with etc.. then 'Mate Rate' doesnt apply.