A front end loader has an output of 200 BCY of earth per hour. It loads a fleet of 3 trucks (capacity of 18 LCY each). The trucks haul the earth to a fill where it is compacted with a shrinkage factor of 10%. Each truck has a total cycle time of 15 minutes, assuming no delays. The earth has a swell of 20%. The job requires 18,000 CCY. How many hours are required to excavate and haul the material to the fill