Answer:
$63.07
Explanation:
So we need to find 15% of 70:
0.15*70=10.5
Next we need to subtract 10.5 from 70(since he used a coupon and got it for a lower price)
70-10.5=59.5
After that we need to find 6% of 59.5
0.06*59.5=3.57
Finally we need to add 3.57 to 59.5 since he had to pay extra(due to tax)
3.57+59.5=63.07
Hope this helps!