Answer:
7.800 trees.
Explanation:
The basic profict equation is Profit = sales - costs.
Profit = sales - (variable costs + fixed costs)
Profit + fixed costs = sales - variable costs
Profit + fixed costs = n° units * (unit selling price - unit variable costs)
In this case, the equation is:
Profit + fixed costs = n° units * (unit selling price - unit variable costs)
$20.000 + $120.400 = n° units * ($40 - $22)
$140.400 = n° units * $18
$140.400 / $18 = n° units
7.800 = n° units