A store is instructed by corporate headquarters to put a markup of 25​% on all items. An item costing ​$16 is displayed by the store manager at a selling price of ​$4. As an​ employee, you notice that this selling price is incorrect. Find the correct selling price. What was the​ manager's likely​ error? The correct selling price is

$20.

To find the correct selling price, we first need to calculate the markup amount based on a 25% markup of the item costing $16.

Markup amount = Cost x Markup Percentage
Markup amount = $16 x 0.25
Markup amount = $4

The correct selling price would be the cost plus the markup amount:
Correct selling price = Cost + Markup amount
Correct selling price = $16 + $4
Correct selling price = $20

The manager's likely error was incorrectly subtracting the markup amount from the cost to determine the selling price, instead of adding the markup amount to the cost.