9 . At a fruit stall, mangoes, peaches and oranges are sold. There were 24 more mangoes than peaches at first. After = of the mangoes, - of the peaches and 22 oranges were sold, there was an equal number of each type of fruits left unsold. (a) What was the total number of fruits left unsold? (b) Mangoes and oranges are sold for $3.50 each. Each peach cost twice as much as each mango. How much money was collected from the sale of fruits? [Source: Maha Bodhi School]