In the first three days of its launch, the galaxy music store sold 14 cds of album x, 8 of album y, and 6 of album z through branch a. through branch b, the store sold 7 cds of album x, 13 of album y, and 4 of album z. branch c sold 2 cds of album x, 11 of album y, and 1 of album z. the total sales from each branch were as follows: branch a: $166, branch b: $145, branch c: $84. what is the price of album y?