Final answer:
The net profit rate on each frame is 80%.
Step-by-step explanation:
To find the net profit rate on each frame, we need to calculate the selling price of the frames and then deduct the overhead cost. First, let's calculate the selling price:
Mark-up = 140% of the cost
Mark-up amount = 140/100 * $772 = $1080.8
Selling price = Cost + Mark-up amount = $772 + $1080.8 = $1852.8
Now, let's calculate the overhead cost:
Overhead rate = 20% of the selling price
Overhead cost = 20/100 * $1852.8 = $370.56
Net profit rate = (Selling price - Overhead cost) / Selling price * 100
Net profit rate = ($1852.8 - $370.56) / $1852.8 * 100 = 80%
The net profit rate on each frame is 80%.