To calculate the total amount of flour needed, you need to add the amounts of regular flour and wheat flour together.
- Regular flour: \(1 \frac{1}{2} = 1.5\) cups
- Wheat flour: \(1 \frac{1}{5} = 1.2\) cups
Now, add these two amounts together:
\[ 1.5 + 1.2 = 2.7 \text{ cups} \]
So, the total amount of flour needed is 2.7 cups.