Determine the marginal cost for Pfizer’s vaccine production expansion for a new infectious disease.

Cost Components	Fixed Costs ($)	Variable Costs per Unit ($)	Production Volume (units)
Vaccine Production	9,000,000,000	50	500,000,000

Requirements:

Calculate the marginal cost per unit.

Assess the impact of production volume changes on the marginal cost.

Determine the pricing strategy based on marginal cost analysis.

Provide recommendations for optimizing vaccine production costs.