I want to collect filing fees and process serving costs and mileage costs

For what?

Did you already have the small claims trial? The judgment (http://courts.michigan.gov/scao/courtforms/smallclaims/dc85.pdf) should include filing fees, process service fees, and mileage fees automatically (the last two of these items are included in the claim form (http://courts.michigan.gov/scao/courtforms/smallclaims/dc84.pdf).). If not, file a bill of costs, and ask the court clerk how these costs should be handled.