University Printers has two service departments (Maintenance and Personnel) and two operating departments (Printing and Developing). Management has decided to allocate maintenance costs on the basis of machine-hours in each department and personnel costs on the basis of labor-hours worked by the employees in each.

The following data appear in the company records for the current period:

	Maintenance			Personnel			Printing			Developing
Machine-hours					1,000			1,000			3,000
Labor-hours		500						500			2,000
Department direct costs	$	13,000		$	39,000		$	43,500		$	33,500

University Printers estimates that the variable costs in the Personnel Department total $19,500 and in the Maintenance Department variable costs total $9,000. Avoidable fixed costs in the Personnel Department are $6,300.

Required:

If University Printers outsources the Personnel Department functions, what is the maximum it can pay an outside vendor without increasing total costs?