Let's assume that the price of crude oil is $37.00 per barrel. At 19.5 gallons of gasoline per barrel, this means that a gallon of gasoline in its crude oil form costs $1.90.
Johnny Tillotson is 77 years old (birthdate: April 20, 1939).
from English Grammar Today. Until is a preposition and a conjunction. Until is often shortened to till or âtil. Till and âtil are more informal and we donât usually use them in formal writing.