Cherrywoods Bakery sells three large muffins for every 2 small muffins sold. A small muffin sells for $3.00, with a variable cost of $2.00. A large muffin sells for $5.00, with a variable cost of $2.50. What is the weighted average contribution margin?

a. $1.95 per muffin

b. $1.25 per muffin

c. $1.75 per muffin

d. $1.90 per muffin

e. Cannot be determined based on the information presented