Answer 1 explanation : Because he ended up with $71.00, the is no way he earned $64 or $13. He spent $7 on snacks, which means he would have had $78 then. But, he spent 1/4 of his money on the movie (not the snacks) so that means he would have more than $78 dollars to start with.
Answer 2 explanation: Because Jani spent half of her money on her bicycle, then and another half on a stereo set. That means she spent 1/4 of her money. Multiply 60 x 4, then you'll get 240.