Cabell Products is a division of a major corporation. Last year the division had total sales of $25,320,000, net operating income of $1,924,320, and average operating assets of $6,000,000. The company's minimum required rate of return is 10%.

The division's margin is closest to:

A: 23.7%

B: 7.6%

C: 32.1%

D: 31.3%