Samara's income is $30 a month and she spends all of it on music downloads and gasoline. The price of a music download is $1.50 and the price of a gallon of gasoline is $3. At Samara's best affordable point, her marginal rate of substitution is ________ per video tape.

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The Answer of Samara's income is $30 a month and she spends all of it on music downloads and gasoline. The price of a music download is $1.50 and the price of a gallon of gasoline is $3. At Samara's best affordable point, her marginal rate of substitution is ________ per video tape.

Samara's Income Is $30 a Month and She Spends All