which is the better buy? 2 - pack of envelopes for $0.24 6 - pack of envelopes for $0.66

which is the better buy? 2 - pack of envelopes for $0.24 6 - pack of envelopes for $0.66
Answer
Explanation:
Step1: Calculate unit price for 2 - pack
To find the unit price (price per envelope) for the 2 - pack, we divide the total price by the number of envelopes. The formula for unit price $p$ is $p=\frac{\text{Total Price}}{\text{Number of Items}}$. For the 2 - pack, total price is $$0.24$ and number of items is 2. So, $p_1=\frac{0.24}{2}= 0.12$ dollars per envelope.
Step2: Calculate unit price for 6 - pack
For the 6 - pack, total price is $$0.66$ and number of items is 6. Using the same unit price formula, $p_2=\frac{0.66}{6}=0.11$ dollars per envelope.
Step3: Compare unit prices
We compare $p_1 = 0.12$ and $p_2=0.11$. Since $0.11<0.12$, the 6 - pack has a lower unit price.