Required information Problem 11-5A Computing and analyzing times interest earned LO A1 [The following information applies to the questions displayed below.] Shown here are condensed income statements for two different companies (assume no income taxes). Miller Company Sales $ 1,200,000 Variable expenses (80%) 960,000 Income before interest 240,000 Interest expense (fixed) 60,000 Net income $ 180,000 Weaver Company Sales $ 1,200,000 Variable expenses (60%) 720,000 Income before interest 480,000 Interest expense (fixed) 300,000 Net income $ 180,000 Problem 11-5A Part 2 2. What happens to each company's net income if sales increase by 30%

What happens to each company's net income if sales increase by 40%?

4. What happens to each company's net income if sales decrease by 10%? (Round your answers to nearest whole percent.)

5. What happens to each company's net income if sales decrease by 30%? (Round your answers to nearest whole percent.)

Can you please break it down to me on how you calculate the net income sales ??? I have been working on this for three hours. I am begging you