The Yellow Clock Company sells a particular clock for $70. The variable costs are $21 per clock and the breakeven point is 300 clocks. The company expects to sell 350 clocks this year. If the company actually sells 480 clocks, what effect would the sale of additional 130 clocks have on operating income? Explain your answer. The sale of an additional 130 clocks would increase operating income by the amount of The total effect would amount to 9100 the additional contribution margin. the income that exceeds fixed costs. the increase in units sold. the revenue that exceeds the breakeven point.