$840,000. QUESTION 9 The cost to produce Part A was $20 per unit in 2019. During 2020, it has increased to $23 per unit make-or-buy decision, incremental costs are $3 per unit. differential costs are $5 per unit. incremental revenues are $5 per unit. net relevant costs are $3 per unit. QUESTION 10 A company has three product lines, one of which reflects the following results: Sales $215,000 Variable expenses 125,000 90,000 Contribution marrin