Pfizer is assessing the costs of producing a new pharmaceutical drug. The fixed production costs are $50,000,000, and the variable costs are $5 per unit. Pfizer expects to produce 10,000,000 units in the first year. Additionally, regulatory approval costs are estimated to be $20,000,000.

Requirements:

1. Calculate the total production and regulatory approval costs.
2. Determine the cost per unit.
3. Analyze the impact of producing an additional 2,000,000 units on total and per-unit costs.
4. Discuss the importance of managing regulatory approval costs.
5. Recommend strategies for optimizing pharmaceutical production.