Trf 2.2.69 :[ml]ḥ ṭb [ytg]bˀ ˀsrˀ ḥd lmdyˀ dy qsṭwn ˁšr w[š]t : fine salt is taxed at one assarius per modius of 16 sextarii
See the entire entry for qsṭwn n.m. a large grain measure