Answer:
The profit margin here is $3
Step-by-step explanation:
The profit margin is calculated by
Profit Margin = Sales - Cost of Sales
And
Cost of sales includes all the labour costs, cost of the inventory that has been sold, overhead cost absorbed in the inventory, depreciation etc.
So here we have cost of sales per unit of $5 per unit and selling price of per unit is $8.
By putting values we have:
Profit Margin = $8 per unit - $5 per unit = $3 per unit