Final answer:
The weighted average contribution margin per unit, calculated by dividing the total contribution from both models by the total unit sales, is $28.75 per unit.
Step-by-step explanation:
To calculate the weighted average contribution margin per unit, we first multiply the contribution margin per unit for each product by its respective unit sales, and then sum these products for both the basic and premium models. Afterward, we divide this sum by the total unit sales of both models to find the average.
Total contribution from both models: $18,750 (basic) + $10,000 (premium) = $28,750
Total unit sales: 750 (basic) + 250 (premium) = 1,000 units
The weighted average contribution margin per unit is thus $28,750 ÷ 1,000 units = $28.75 per unit.