Answer:
Final cost of the subscription for 7 days will be $115.748
Explanation:
30 days subscription = $499 + 8% tax
So subscription for 30 days = 499 +

= $499 + $39.92
= $538.92
Since we have to calculate the cost of the subscription for the 7 days on the prorated basis.
Therefore, total subscription for 7 days = Subscription for one day × number of days
=

= 17.964 × 7
= $125.748
Since we have a coupon for $10 off so the final cost will be = $125.75 - $10
= $115.748
Final cost of the subscription for 7 days will be $115.748