Math Question

Hi Teachers,
I have done the following Math question. I hope someone can confirm with me. My answer is $3888.Thanks in advance.

Lynn has been giving tuition to group of 3 (three) Primary School students at a rate of
$12 per student per hour. Each class is 2 hours per session, and she conducts sessions
separately for English, Maths and Science (a total of three sessions per week). She
teaches from January to mid- May giving a grand total of 18 weeks of classes.
How much does Lynn earn yearly?