=+14-48 KK Calculating environmental impact OBJECTIVE 9 Winchel Ltd provides an interstate moving service. Each year Winchel moves approximately 5000 families. The average move requires 25 cardboard boxes. Winchel Ltd purchases these cardboard boxes at a cost of $2.75 each. A cardboard box has a useful life, on average, of three moves after which it is discarded to landfill at a cost of $25.10 per tonne. It requires one tonne of cardboard to produce 350 cardboard boxes. Each tonne of cardboard requires 17 trees to produce and results in the emission of 1.52 tonnes of carbon dioxide.