American Produce Company purchased a truckload of cantaloupes weighing 4,000 pounds for $1,200. American Produce separated the cantaloupes into two grades: superior and economy. The superior grade cantaloupes had a total weight of 3,200 pounds and the economy grade cantaloupes totaled 800 pounds. American Produce sells the superior grade at $0.45 per pound and the economy grade at $0.25 per pound. How much of the $1,200 cost of the truckload will be allocated to the superior grade cantaloupes using the physical quantity method?