| This is a Musical Theater forum. Your best bet is to go to the Oklahoma University website and gather all the information regarding costs, admission standards and financial needs. I suspect that, in general, international students don't get a lot of need-based financial aid. You will likely also have to pass a test for English as a second language.
It is certainly possible to work and go to school at the same time. You may have missed a decimal point; in general supermarket sorts of jobs will earn anywhere from minimum wage up and would thus range from $5.15US to $7.00 US or more.
Representatives from the University can also be reached by email and will be of more help to you with all these issues
good luck | 
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