Information for two companies follows:

Skittles Company Starburst Company

Sales $ $3,873,350$ $ $3,962,500$

Contribution margin $2,433,3501,337,500$

Fixed costs $1,839,850802,500$

$(1)$ 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 $30\%$ increase in sales?