Thermal Rising, Inc., makes paragliders for sale through specialty sporting goods stores. The company has a standard paraglider model, but also makes custom-designed paragliders. Management has designed an activity-based costing system with the following activity cost pools and activity rates:

Activity Cost Pool	Activity Rate
Supporting direct labor	$16	per direct labor-hour
Order processing	$190	per order
Custom designing processing	$263	per custom design
Customer service	$418	per customer

Management would like an analysis of the profitability of a particular customer, Big Sky Outfitters, which has ordered the following products over the last 12 months:

	Standard Model	Custom Design
Number of gliders	13	2
Number of orders	2	2
Number of custom designs	0	2
Direct labor-hours per glider	27.50	32.00
Selling price per glider	$1,700	$2,300
Direct materials cost per glider	$458	$582

The company's direct labor rate is $20 per hour.

Required:

Using the company's activity-based costing system, compute the customer margin of Big Sky Outfitters.(Negative amount should be indicated by a minus sign. Omit the "$" sign in your response.)