Andrea bought 12 bagels and 10 muffins at the bakery.
Of these items, 2/3 of the bagels were multigrain and 3/5 of the muffins were bran muffins.
12a
We need to multiply 2/3 by 12 to get the number of multigrain bagels.

Therefore, she bought 8 multigrain bagels.
12b
We need to multiply 3/5 by 10 to get the number of bran muffins.

Therefore, she bought 6 bran muffins