Navarix Company has two divisions that reported the following results for October: Milwaukee Division Sales $250,000 Variable expenses as a percent of sales / 60% Segment margin S40,000 Chicago Division $400,000 55% $60,000 Net operating income for October was $15,000. Common fixed expenses must have been: $270,000 $85,000. $345,000 $45,000. The marketing manager believes that if advertising is increased by $7,000 in the Milwaukee Division, its sales will increase by $50,000. If the marketing manager is correct, Milwaukee Division's segment margin will increase by: $10,000. $3,000 $8,000 $13,000