Careful how you define 'course'.
Typical tuition here is 7k-11k for a local student for 10 courses lasting 12 weeks each (4 month courses, 12 weeks of instruction + exams). If a 'course' is actually an 8 month then 1400 dollars per course is about right.
Now the catch: Tuition for a foreign student is 20k/year. Ah ha. That's why the chinese market is so interesting. UC is a very prestigious school if you're in india or china, because even bad north american universities are way better than most of the schools in china or india (in terms of prestige anyway). And you could pay 7k per course and not have to fly half way around the world to do so.
The article talks about a pre-calculus course worth 4 credits. according to http://www.universityofcalifornia.edu/senate/manual/rpart3.html 1 has
"The value of a course in units shall be reckoned at the rate of one unit for three hours' work per week per term on the part of a student, or the equivalent."
http://senate.ucsc.edu/manual/santacruz-division-manual/part-two-regulations/section-three-ug-program/chapter-ten-requirementsfordegrees/index.html
Says 180 credits to graduate. So you need 45 credits per year. This would put their costs at 16k/year in tuition. Still cheaper than foreign student tuition (and no living costs), but not as lucrative as being a local resident going to school. Which seems exactly like the market it was aimed at.