Ring, Incorporated's income statement for the most recent month is given below.

	Total	Store P	Store Q
Sales	$1,176,000	$416,000	$760,000
Variable expenses	448,800	172,800	276,000
Contribution margin	727,200	243,200	484,000
Traceable fixed expenses	422,000	114,000	308,000
Segment margin	305,200	$129,200	$176,000
Common fixed expenses	37,000
Net operating income	$268,200

The marketing department believes that a promotional campaign at Store P costing $6,800 will increase sales by $18,000. If the campaign is adopted, overall company net operating income should: (Round your intermediate calculations to two decimal places.)

a)

decrease by $13,600
	b) increase by $3,640
	c)increase by $3,160
	d) decrease by $3,160