Ncube Gaming Systems generated operating income of $400,000 on $3,200,000 in sales. The company had $1,800,000 in assets on January 1 and $2,200,000 in assets on December 31. What was the company’s...

Ncube Gaming Systems generated operating income of $400,000 on $3,200,000 in sales. The company had $1,800,000 in assets on January 1 and $2,200,000 in assets on December 31. What was the company’s return on investment for the year?

a. 12.5%

b. 18.2%