Check my wo Feather Friends,Inc, distributes a high-quality wooden birdhouse that sells for $120 per unit. Variable expenses are $60.00 per unit, and fixed expenses total $180,000 per year. Its operating results for last year were as follows: distributes a high-quality wooden birdhouse that sells for $120 per unit Sales Variable expenses Contribution margin Pixed expenses Net operating income 3,000,000 1,500 000 1,500,000 180,000 $1,320,000 int ences