If school doesn't report GPA, how will they evaluate my school performances?

Hi guys

I’m currently studying in Taiwan(permanent resident) but my school does not report GPA. Instead, our school uses score on a 100 scale and score conversion as follow. A=80up, B=70-79, C=60-69, D=50-59, F=below49
Will they convert individual course scores to GPA first(eg. A=4.0, B=3.0… ), and then get the average?
Or only convert the final average to GPA
Or just the original score on 100 scale?

9th-11th average: 83.7
Is it a good one or I would be deferred/denied (applied EA)?
SAT 1340/1910
TOEFL 101
Computer Science

Thanks a lot

This is a bit complicated-- please e-mail the admissions department at OSU with this type of question.

Do you attend a public high school? If so, your school should be able to help translate your GPA