Exercise $18-24($Static$)$ Computing and comparing operating leverage LO A$2$

Information for two companies follows:

$$Skittles CompanyStarburst CompanySales$ $6,000,000$$ $4,500,000$Contribution margin$3,600,0001,125,000$Fixed costs$2,600,000375,000$

$(1)$ Compute the degree of operating leverage $($DOL$)$ for each company.

$(2)$ Which company is expected to produce a greater percent increase in income from a $20\%$ increase in sales?