Suppose mary is in consumer equilibrium. the marginal utility of good a is 30, and the price of good a is $2.

a. if the price of good b is $4, the price of good c is $3, the price of good d is $1, and the price of all other goods and services is $5, what is the marginal utility of each goods mary is purchasing?

b. if mary has chosen to keep $10 in savings, what is the ratio of mu to p for savings?

a) The marginal utility of each good is 30/$2, or 15/$1. Multiply this marginal utility by the price of each good/service to obtain the marginal utility per unit of good. You've done this exactly correctly.

b) I have no idea where to begin with other than the $10 factoring in somehow, it could be just 15x10=150

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