You can buy 24 doughnuts for $8.40. Jane Dough sells each doughnut for an additional 15 cents to earn a profit from what it originally costs her to make them. How much does it cost Jane to make each doughnut? A.15 cents
B.20 cents
C.55 cents
D.$2.70

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?