Answer:
[tex]\large\boxed{\large\boxed{\$ 17.60/hour}}[/tex]
Explanation:
The profit will be the revenue less the cost.
The revenue will be the price times the number of items sold. The price is $40 the piece. Work with a piece.
The total cost of a piece is the sum of the cost of the supplies, the seller's fees and the shipping costs of a piece:
Profit = Revenue - Cost = $40 - $13.60 = $26.40
To find the hourly profit you must divide the profit of a piece by the hours of labor to make a piece.