Lucinda could buy either 2 kewpie dolls and 1 beanie baby, or 1 beanie baby and 2 kewpie dolls at $6 a piece if she has $18. Rationally, Lucinda would want at least one of each toy. Whether she went with the first or second option the amount she would spend would be as follows: $6Ă—3 toys=$18.