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1. \({9 \choose 3}\) meals. First spend $7 to buy one of each item, then use 3 stars to select items between 6 bars.

2. \({16 \choose 6}\) meals. Here you have 10 stars and 6 bars (separating the 7 items).

3. \({16 \choose 6} - \left[{7 \choose 1}{13 \choose 6} - {7 \choose 2}{10 \choose 6} + {7 \choose 3}{7 \choose 6}\right]\) meals. Use PIE to subtract all the meals in which you get 3 or more of a particular item.