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Principles of Microeconomics
Matthew and Susan are both optimizing consumers in
the markets for shirts and hats, where they pay $\$ 100$
for a shirt and $\$ 50$ for a hat. Matthew buys 4 shirts
and 16 hats, while Susan buys 6 shirts and 12 hats.
From this information, we can infer that Matthew's marginal rate of substitution is _____ hats per shirt, while Susan's is _____.
a. $2,1$
b. $2,2$
c. $4,1$
d. $4,2$