You've got a business selling officially licensed University of Michigan masks, but have reasonably high market power based on your particular design. You survey your customers to build a demand curve and estimate the demand elasticity to be -5. We're pretty confident we can trust that value. Your current best selling mask is priced at $10 and you have a marginal cost of $6. How should you modify your price?

Raise the price per mask to $16

Raise the price per mask to $12.50

Keep the price at $10

Lower the price per mask to $7.50

Lower the price per mask to $6