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	$	13,500		$	37,250		$	41,400		$	34,000

University Printers estimates that the variable costs in the Personnel Department total $15,000 and in the Maintenance Department variable costs total $8,400. Avoidable fixed costs in the Personnel Department are $5,100.

Required:

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