Answer
For the new customer mix of 80% and upgrade customer mix of 20%
New Breakeven Point in Units = $16,500,000 / $120
New Breakeven Point in Units = 137,500 units
Work Step by Step
New Contribution Margin per Unit = (130 * 0.80) + (80 * 0.20)
New Contribution Margin per Unit = 104 + 16
New Contribution Margin per Unit = 120
New Breakeven Point in Units = Fixed Costs / New Contribution Margin per Unit