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Bec is buying 40 kilograms of dry dog food for her bullmastiff.
The table below lists the original price and the amount of discount on a 40 kilogram bag of dry dog food at four different pet stores.
| 40 kg Dry Dog Food Prices | ||
| Shop | Original price | Discount |
| A. | \($220\) | \(18\text{%}\) |
| B. | \($245\) | \(25\text{%}\) |
| C. | \($250\) | \(\dfrac{1}{5}\) |
| D. | \($230\) | \($35\text{ off}\) |
Which shop has the lowest sale price for the jeans?
\(A\)
\(\text{Consider the sale price at each shop:}\)
| \(\text{A}\) | \(= 220-(18\text{%}\times 220)=220-39.60= $180.40\) |
| \(\text{B}\) | \(= 245-(25\text{%}\times 245) = 245-61.25 =$183.75\) |
| \(\text{C}\) | \(= 250-(\dfrac{1}{5}\times 250) = 250-50= $200\) |
| \(\text{D}\) | \(= 230-35 = $195\) |
\(\therefore\ \text{Shop }A\text{ has the lowest sale price.}\)
\(\Rightarrow A\)