Income statements for Mount Lewis Copy Centers for 2013 and 2014 appear below (in the text).

a. Compute and interpret the degree of operating leverage, degree of financial leverage, and degree of combined leverage in 2013. Assume the components of the costs of good sold are all variable costs.

b. Compute and interpret the degree of operating leverage, degree of financial leverage, and degree of combined leverage in 2014. Assume the components of the costs of good sold are all variable costs.

c. Why did these numbers change between 2013 and 2014?