Answer:
A) (15 x $3) + (10 x $2) + (12 x $1) = X
B) $77
Explanation:
A) Each wrapping paper is 3 dollors, and they bought 15 (15 x 3)
Each greeting card is 2 dollors, and they bought 10 (10 x 2)
Each roll of ribbon is 1 dollors, and they bought 12 (12 x 1)
B) 15 times 3 is 45
10 times 2 is 20
12 x 1 is 12
45 + 20 + 12 = 77