Fantasy Kingdom would like to construct a new ride. The ride would cost BDT 45,00,000 to construct and it would have a 10% salvage value at the end of its 15 years useful life. It is estimated that the following annual costs and revenues would be associated with the ride.

Ticket revenues	BDT 25,00,000
Maintenance expenses	BDT 4,00,000
Salaries	BDT 9,00,000
Depreciation	BDT 2,70,000
Insurance	BDT 3,00,000

Calculate the Pay Back Period (PBP).