Answer:
1,150 units
Explanation:
Data given in the question
Estimated firm sales used in its base case analysis = 1,000 units
upper and the lower bonds = +/-15%
So, the best case for units sold per year is
= Estimated firm sales used in its base case analysis + Estimated firm sales used in its base case analysis × upper and the lower bonds
= 1,000 units + 1,000 units × 15%
= $1,000 units + 150 units
= 1,150 units