Final answer:
All three stores offer the product at the same price of $27 after accounting for discounts. The best price then depends on the value placed on the warranty, with Store 1 offering the longest duration at 5 years.
Step-by-step explanation:
To determine which store offers the best price, we must consider not only the sticker price but also any additional discounts or the duration of the warranty provided. Assuming the stores are offering the same product, it looks like Store 1 and Store 2 have the same initial price of $27 with no discounts, but different warranties of 5 and 3 years respectively. Store 3 offers the product at a higher price of $30 but includes a 10% discount and a 4-year warranty.
To calculate the best deal, we must subtract the discount from the initial price in case of Store 3:
Store 3's discounted price = $30 - (10% of $30) = $30 - $3 = $27.
All stores ultimately offer the product at the same price of $27 after accounting for the discount in Store 3. Therefore, the best price would then depend on the value the customer places on the warranty duration. With the longest warranty, Store 1 might be considered the best option for some consumers.