Answer:
The total charge that Cheryl will have to pay if she uses her credit card to pay for the tickets will be £100.98
Step-by-step explanation
Price of each adult ticket is £12 and price of each child ticket is £6
Cheryl rings the booking office to buy 6 adult tickets and 3 child tickets. So, the total price of all tickets
She is told that a 10% booking fee will be added to the ticket price. So, the price of the tickets including the booking fee
Now, 2% extra charge will then be added if she is paying by credit card. So, the amount of this extra charge
So, the total charge for buying the tickets £100.98