The formula to calculate the Average Monthly Sales (AMS) is:
\[ AMS = \frac{AS}{12} \]
Where:
Let's say the total annual sales (AS) is $120,000. Using the formula:
\[ AMS = \frac{120,000}{12} \]
We get:
\[ AMS = 10,000 \]
So, the average monthly sales is $10,000.