so in this problem, you’d tax first then tip.
$6.45(1.08)= $6.97
with this, it gives you the amount after tax there are other way like this
$6.45+$6.45(.08)= $6.97
after you have found the amount, do the same thing with the tip amount:
$6.97(1.2)= $8.36
Total for purchase: $6.45
Amount taxed: $.52
Amount Tipped: $1.40
Subtotal: $8.37 this rounded differently, use the $8.36 on the top.