What effective annual interest rate does the firm earn when a customer does not take the discount? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g. 32.16.) Effective annual interest rate % What effective annual interest rate does the firm earn if the discount is changed to 3 percent? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Effective annual interest rate % What effective annual interest rate does the firm earn if the credit period is increased to 70 days? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Effective annual interest rate % What effective annual interest rate does the firm earn if the discount period is increased to 25 days? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g. 32.16.) Effective annual interest rate %