For the scholarship that you are applying for the SAT range is 1390 - 1440, meaning from a SAT standpoint, your scores are at the bottom of the band
https://admissions.arizona.edu/cost-aid/international/international-tuition-award
Maybe your GPA does not convert to a 4.0 US equivalent and they awarded your scholarship accordingly
in addition
You may have been awarded this amount if you are not physically present in the US according to Arizona Prop 300
https://ballotpedia.org/Arizona_Public_Program_Eligibility,Proposition_300(2006)