1 batch of sugar cookies = 3/4 tablespoon
2 batch of sugar cookies = 3/4 x 2 = 1 1/2 tablespoon.
1 batch of lemon cookies = 1/2 tablespoon
1/2 batch of lemon cookies = 1/2 x 1/2 = 1/4 tablespoon
Total = 1 1/2 + 1/4 = 1 3/4
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Answer: He needs 1 3/4 tablespoon of vanilla.
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