A Nile cruiser tourist service in Luxor charges $18 per ticket to the west bank plus a $3 other charges to fund planned equipment upgrades. It expects to sell 4,700 tickets during the eight-week winter season. During that period, the cruiser will experience $110,000 in labor costs. Materials required for each passage sold (tickets, a tourist-information sheet, etc.) cost $1.30. Overhead during the period comes to $79,000. What is the multifactor productivity ratio?