Https://www.symbolab.com/solver/function-asymptotes-calculator this is a good asymptote calculator
I think the answer is 156, I got this by multiplying 12 times 13.
The price of album y is $5.80. I solved the system of equations of B and C. Getting rid of the variable z, I was able to get rid of x next. Solving this system gave me $5.80 without having to substitute into the other equation.