Given data:
The given registration fees for preschool A is c=$40.00.
The given attendence fees for preschool A is a=$5.00/day.
The given attendence fees for preschool B is b=$7.50/day.
The total fees for school A is,

The total fees for school B is,

The cost of both preschool is same.

Thus, the option (C) is correct.