Bribie Company expects the following results for the next accounting period: Sales $240,000 Variable costs $135,000 Fixed costs $ 40,000 Expected production and sales in units 3,000 The sales manager believes sales could be increased by 400 units if advertising expenditures were increased by $10,000. If advertising expenditures are increased and sales increase by 400 units, the effect on operating income will be a(n) increase of $30,000 Correct Answer increase of $4,000 cannot be determined from data given increase of $22,000 decrease of $4,000