1. Given the following data, answer the questions below the table:

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Data
Unit sales	30,000	units
Selling price per unit	$10	per unit
Variable expenses per unit	$5	per unit
Fixed expenses	$120,000

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a) What is the break-even in dollar sales?

b) What is the margin of safety percentage?

c) What is the degree of operating leverage? (Round your final answer to 2 decimal places.)

d) Using the degree of operating leverage, calculate the percentage change in net operating income if unit sales increase by 20%.