Monty Design Works generated $531,920 in operating income on sales revenue of $2,659,600. The company had $2,010,000 in assets on January 1 and $2,870,000 in assets on December 31.

A.) Calculate Monty's margin: ____%

B.) Calculate Monty's asset turnover: _____ times

C.) Calculate Monty's return on investment: _____%