The Yellow Clock Company sells a particular clock for $45. The variable costs are $20 per clock and the breakeven point is 300 clocks. The company expects to sell 350 clocks this year. If the company actually sells 530 clocks, what effect would the sale of additional 180 clocks have on operating income? Explain your answer. The sale of an additional 180 clocks would operating income by the amount of The total effect would amount to $