Antonio purchased adult and child tickets for the fair. Tickets cost $29.35 for each adult and $17.45 for each child. Let x represent the number of adult tickets purchased and y represent the number of child tickets purchased. Write an expression to represent the total cost of the tickets Antonio purchased.
A $29.35y + $17.45x
B $29.35x + $17.45y
C ($29.35 + $17.45)(x + y)
D ($29.35 - $17.45)(x + y)