Cell A$1$ contains the cost of a face value concert ticket. However, purchasing the ticket adds a $20\%$ convenience fee to the cost, plus a flat $$5$ service fee. So for instance, a $$100$ face value ticket would cost a total of $$125$ with fees. Which formula would be used to compute the total cost?

$=A1+5**20+A1$

$=A1**20+5+A1$

$=A1+5**20\%+A1$

$=A1**20\%+5+A1$