Answer:
Store Z
Explanation:
1 - Find out what the price per can is at each store
Store X
4 cans for $2.38
2.38price/4can(s) = price per can
Store x is $0.598/can
Store Y
5 cans for 3.00
$3.00/5
$0.60/can
Comparing these to store Z; store Z is still the better deal.
Hope this helps :)