The first thing we must do for this case is to calculate the total amount paid.
We have then:
We are now looking for an additional 6% of the amount.
For this, we make the following rule of three:
9.40 --------> 100%
x ------------> 106% From here, we clear the value of x.
We have then:
Answer: you paid: ![x = 9,964](https://img.qammunity.org/2019/formulas/mathematics/middle-school/untr7g8teiz8cuo400ghj77doqqxwjkpn8.png)