Macaulay Roller Skates has three product lines-D, E, and F. The following information is available: The company is deciding whether to drop product line F because it has an operating loss. Assuming fixed costs are unavoidable, if Macaulay drops product line F and does not replace it, what effect will this have on operating income? Operating income will decrease exist20,000. Operating income will increase exist20,000. Operating income will increase exist5,000. Operating income will increase exist25,000