### Part A: Determine the Unit Price of the Item
Let's choose the item "eggs" to determine the unit price at each location.
At the Grocery Store:
- Price of 12 eggs: \[tex]$3.00
- Calculation of unit price:
\[
\text{Unit Price at Grocery Store} = \frac{\$[/tex]3.00}{12 \text{ eggs}} = \[tex]$0.25 \text{ per egg}
\]
At the Farmer's Market:
- Price of 7 eggs: \$[/tex]1.40
- Calculation of unit price:
[tex]\[
\text{Unit Price at Farmer's Market} = \frac{\$1.40}{7 \text{ eggs}} = \$0.20 \text{ per egg}
\][/tex]
### Part B: Determine the Better Deal and Explain
Based on our calculations in Part A:
- Unit Price at Grocery Store: \[tex]$0.25 per egg
- Unit Price at Farmer's Market: \$[/tex]0.20 per egg
Comparison:
[tex]\[
\$0.25 \text{ per egg} \quad \text{(Grocery Store)} \quad > \quad \$0.20 \text{ per egg} \quad \text{(Farmer's Market)}
\][/tex]
The Farmer's Market offers a better deal for the eggs, as the unit price is lower there. This means Ahmed will spend less money per egg if he buys them from the Farmer's Market.
Therefore, the Farmer's Market is the better option for purchasing eggs.
