Question

Martha is buying two. Each shirt costs $20. She is considering two options to purchase the shirts.
Option A: Use the stores sale- buy one get another shirt 50% off
Option B: use a coupon for 30% off the entire purchase.
show all steps for solving the cost for the shirts after discount for option A and B

Answer 1

Let's break down the costs for both options step by step.

### Option A: Buy One Get One 50% Off

1. **Cost of the first shirt:**
\[
\text{Cost of first shirt} = 20 \text{ dollars}
\]

2. **Cost of the second shirt (50% off):**
\[
\text{Cost of second shirt} = 20 \text{ dollars} \times 0.50 = 10 \text{ dollars}
\]

3. **Total cost for Option A:**
\[
\text{Total cost} = \text{Cost of first shirt} + \text{Cost of second shirt} = 20 + 10 = 30 \text{ dollars}
\]

### Option B: 30% Off the Entire Purchase

1. **Total cost before discount:**
\[
\text{Total cost before discount} = 20 \text{ dollars} + 20 \text{ dollars} = 40 \text{ dollars}
\]

2. **Calculate the discount (30% off):**
\[
\text{Discount} = 40 \text{ dollars} \times 0.30 = 12 \text{ dollars}
\]

3. **Total cost after discount for Option B:**
\[
\text{Total cost} = \text{Total cost before discount} - \text{Discount} = 40 - 12 = 28 \text{ dollars}
\]

### Summary of Costs:
- **Option A (Buy One Get One 50% Off):** $30
- **Option B (30% Off Entire Purchase):** $28

**Conclusion:** Option B is cheaper, costing $28 compared to $30 for Option A.