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Recent reported financial data from Wilco, Inc. is as follows: How many units would Wilco have to sell to earn an after-tax profit of $615,000 if Wilco's effective tax rate is 25% ? 2,358 3,153 4,050 3.538 Wilco inc. produced and sold 45,000 units of their sole product, a solar powered slide rule, and reported the following results: If Wilco's sales increase by 2%, what will be their percentage change in operating income? 20.24% 15.45\%. 50% 10%