Step-by-step explanation:
Let's calculate the cost of towels and spray purchased and used during September:
1. **Towels:**
- Initial towels: 50 boxes
- Remaining towels: 4 boxes
- Towels used: 50 - 4 = 46 boxes
Cost of towels used = Number of boxes used * Cost per box
Cost of towels used = 46 * $15 = $690
2. **Spray:**
- Initial spray bottles: 28 bottles
- Remaining spray bottles: 2 bottles
- Spray bottles used: 28 - 2 = 26 bottles
Cost of spray used = Number of bottles used * Cost per bottle
Cost of spray used = 26 * $6 = $156
Therefore, during September, Shine Right spent $690 on towels and $156 on spray for detailing car interiors.
