6. If the price elasticity of demand for milk is 3.2 between a price of $3.00 and $3.50, and if consumers are now buying 1000 gallons per day at a price of $3.20, how many gallons of milk will be bought per day if the price goes down to $3.00? (Use standard elasticity approach of percent change in quantity / percent change in price, not arc elasticity.)