Final answer:
To find the original selling price of the kayak set, use the concept of markdowns. Subtract the markdown from the one-day sale price to find the original price.
Step-by-step explanation:
To find the original selling price of the kayak set, we can use the concept of markdowns. Let's assume the original price of the kayak set is P. The markdown is the discount offered by the store manager. From the given information, we know that the one-day sale price of the kayaks is $328.
We can represent this information in the equation: P - markdown = $328. To find the original price, we need to solve for P. If we rearrange the equation, we get: P = $328 + markdown.
Therefore, the original selling price of the kayak set is $328 + markdown. The value of markdown can be calculated by subtracting the one-day sale price from the original price.