$45.36 you will pay
Put 42 in ur calculator and then add 8% and then press enter u will get 45.36
Or other way to do it 8% basically mean 8 divided by 100 calculate it u will get 0.08 multiply this number by 42 u will get 3.36 this is how much tax u should pay so add it to the price without tax 42+3.36= 45.36.