High Fly Company manufactures model airplanes. During the month, it manufactured 10,000 airplanes. Each airplane used an average of 13 direct labour hours and an average of 1.5 sheets of aluminum. High Fly normally manufactures 18,000 airplanes each month. Materials and labour standards for making the airplanes are as follows:

Direct materials (1 sheet of aluminum @ $10.00 per sheet)	$10.00
Direct materials (other accessories @ $8.75)	8.75
Direct labour (12 hours @ $7.00 per hour)	84.00

How many standard hours are allowed for a volume of 20,000 airplanes?