which is the better buy? 7 - pack of hot dogs for $5.04 3 - pack of hot dogs for $2.19

which is the better buy? 7 - pack of hot dogs for $5.04 3 - pack of hot dogs for $2.19
Answer
Explanation:
Step1: Calculate unit - price of 7 - pack
To find the unit - price of the 7 - pack, divide the total cost by the number of hot - dogs. The total cost of the 7 - pack is $5.04. So the unit - price $u_1=\frac{5.04}{7}=0.72$ dollars per hot - dog.
Step2: Calculate unit - price of 3 - pack
To find the unit - price of the 3 - pack, divide the total cost by the number of hot - dogs. The total cost of the 3 - pack is $2.19. So the unit - price $u_2 = \frac{2.19}{3}=0.73$ dollars per hot - dog.
Step3: Compare unit - prices
Since $0.72<0.73$, the 7 - pack has a lower unit - price.
Answer:
The 7 - pack of hot dogs is the better buy.