ANSWER:
$55.2
STEP-BY-STEP EXPLANATION:
The first thing is to calculate 40% of the $ 80 and subtract it from the original value, just like that
[tex]80-(80\cdot\frac{40}{100})=80-32=48[/tex]Then, we do the same for this 48%, and we apply the processing fee which is 15%, like this
[tex]48+(48\cdot\frac{15}{100})=48+7.2=55.2[/tex]Which means that in total you will pay $55.2