The formula to calculate the Blended Margin (BM) is:
\[ \text{BM} = \frac{\text{AS} - \text{AC}}{\text{AS}} \times 100 \]
Where:
Let's say the average sales revenue (AS) is $1000 and the average COGS (AC) is $600. Using the formula:
\[ \text{BM} = \frac{1000 - 600}{1000} \times 100 = 40\% \]
So, the blended margin is 40%.