Information for two companies follows skittles company sales $6,485,950$ contribution margins $4,585,950$ fixed costs $3,519,450$ Starbucks company sales for $4,218,000$ contribution margins $1,443,000$ fix cost $888,000.(1)$ Compute the degree of operating leverage $($DOL$)$ for each company. $(2)$ Which company is expected to produce a greater percentage increase in income from a $10\%$ in sales?