concession stand math prob help!!!

Question

You spend some time observing orders at a concession stand. The first customer buys 3 candy bars, 2 bags of popcorn, and 2 bottles of pop and spends $10.50. The second customer buys 2 candy bars, one bag of popcorn, and 3 bottles of pop and spends $10.00. The third customer buys 4 candy bars, 3 bags of popcorn, and 2 bottles of pop and spends $13.00.  

1.  How much does a candy bar, a bag of popcorn, and a bottle of pop cost?  
2. How much would you spend if you bought 6 candy bars, 2 bags of popcorn, and 4 bottles of pop?

Answer 1

The answer is:

x = $1.5 Candybar

y = $1 Popcorn

z = $2 Pop