Let's denote the total cost from Balloon Express as \(C_E\) and the total cost from Balloon Mania as \(C_M\).
For Balloon Express:
- Cost per balloon = $2
- Delivery fee = $10
- Number of balloons = 30
The cost for balloons from Balloon Express can be calculated as: \[ C_E = (2 \times 30) + 10 \] \[ C_E = 60 + 10 = 70 \]
For Balloon Mania:
- Cost per balloon = $1.50
- Delivery fee = $20
- Number of balloons = 30
The cost for balloons from Balloon Mania can be calculated as: \[ C_M = (1.50 \times 30) + 20 \] \[ C_M = 45 + 20 = 65 \]
Comparing Costs:
Now we can compare the total costs:
- Cost from Balloon Express: \(C_E = 70\)
- Cost from Balloon Mania: \(C_M = 65\)
Conclusion:
Balloon Mania is the cheaper option. To find out how much the O'Donnells will save by choosing Balloon Mania over Balloon Express: \[ \text{Savings} = C_E - C_M = 70 - 65 = 5 \]
Thus, the O'Donnells should choose Balloon Mania, and they will save $5.