Davidson Company consists of two districts, A and B. During July, the company as a whole had sales of $300,000, a contribution margin ratio of 20%, and a combined segment margin totaling $25,000. District A had sales of $80,000, a contribution margin ratio of 35%, and a segment margin of $10,000. If the net operating income of Davidson Company for July is $11,000, the traceable fixed expenses in District B must have been: 1) $17,000. 2) $18,000. 3) $52,000. 4) $14,000