The first thing we must do for this case is to calculate the total amount paid.
We have then:
[tex] 6.50 + 2.90 = 9.40
[/tex]
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: [tex]x = (106/100) * (9.40)
x = 9,964[/tex]
Answer: you paid: [tex]x = 9,964 [/tex]
