If you take 10 units of courses a quarter, then it's $8940 a quarter. It should then take five quarters to finish the degree, which is about 45k.
I also think 33k is an overestimate of living expenses. If you live in a double room and the housing will cost $7600 for a full year and 10k for five quarters.
http://www.stanford.edu/dept/rde/shs/pdfs/grad_rates_11.pdf
And Assume that you cook very often, then you can probably keep the food cost under $6000 for five quarters. Then we add the health insurance and other costs, we can probably keep the total cost under 23k for 5 quarters.
Plus 45k for tuition, then it should be approximately 68k.
I personally think that it's a reasonable amount for a master's program.