Hello DINOCALC09I'm assuming that the total takings for the rides was $27,000. Then let the takings on the kiddie rides be $ , and on the other rides be $ .

Total takings = $27,000 (1)

Total profit = $5,240

(2)

Multiply both sides of (1) by :

Subtract from (2):

and

So they took $10,000 on the kiddie rides.

Grandad