how much was albuterol 0.083% neb soln first prescribed to patient 808 in 08/2105?
select prescriptions.dose_val_rx from prescriptions where prescriptions.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 808 ) and prescriptions.drug = 'albuterol 0.083% neb soln' and strftime('%y-%m',prescriptions.startdate) = '2105-08' order by prescriptions.startdate asc limit 1