Mrs. Easton plans to hire a balloon artist for her daughter's birthday. The graph shows the cost per hour to hire the artist. If there are more than 10 children at the party, the balloon artist charges an additional supply fee of $35. There will be 15 children at the Easton party. How much will the balloon artist charge Mrs. Easton for a party that is 4.5 hours long?

Multiple choice question.

A)

$60.25

B)

$67.50

C)

$98.75

D)

$102.50

Help ASAP