11. Nerrod Company sells its products at $780 per unit, net 30. The firm's gross margin ratio is 40 percent. The firm has estimated the following operating costs:

Activity	Cost Driver and Rate
Sales calls	$	540	per visit
Order processing	$	170	per order
Deliveries	$	65	per order + $0.50 per mile
Sales returns	$	80	per return and $3.0 restocking per unit returned

Nerrod Company has gathered the following data pertaining to activities it performed for two of its customers:

	XBT		NINTO
Number of orders	24		2
Number of parts per order	640		2,140
Sales returns:
Number of returns	4		10
Number of units returned	40		50
Number of sales calls	11		7
Miles per delivery	10		20
Shipping terms	FOB, Factory		FOB, Destination

What is Nerrod's total sales-sustaining cost applicable to XBT as a customer?

• $0.

• $990.

• $4,190.

• $6,370.

• $6,490.