San Remo has a $4,020,000 asset investment and is subject to a 30% income tax rate. Cash inflows are expected to average $620,000 before tax over the next few years; in contrast, average income before tax is anticipated to be $509,000. The company's after-tax accounting rate of return is:

a. 8.86%
b. 10.80%
c. 12.66%
d. 15.42%
e. None of these.