Original price = $13.45
Discount = 15%
Taxes = 6%
1.- Calculate the price with discount
13.45 ---------------------- 100
x ----------------------- 15
x = (15 x 13.45) / 100
x = 201.75/100
x = $2.0175
13.45 - 2.0275 = $11.4325 Price with discount
2.- Price plus taxes
11.4325 --------------------- 100
x --------------------- 6
x = (6 x 11.4325) / 100
x = 68.595 / 100
x = $0.686
Payment = 11.4325 - 0.686
= $ 10.7466