Holly's Ham, Inc. sells hams during the major holiday seasons. During the current year 11 $220,000 of sales revenue, $55,000 of variable costs, and $24,000 of fixed costs 11,000 hams were sold resulting in 1) If sales increase by $40,000, operating income will increase by: A) $10,000 C) $30,000 B) $20,000 D) None of these answers are correct