Biluebird Manufacturing has received a special one-time order for 15,900bird feeders at $3.90 per unit. Bluebird currently produces and sells 75,000 units at $7.90 each. This level represents 80% of its capacity. Production costs for these units are $4.40 per unit, which includes $3.15 of variable costs and $2.15 of fixed costs. If the special offer is accepted, there will be no incremental fixed cost. If Bluebird accepts this additional business, the effect on income will be: $50,085 increase