\textbf{Propotion}  John bought $\dfrac{4}{5}$~as many pears as apples and $\dfrac{2}{5}$~as many mangoes as apples.  She paid a total of $150 for all the fruits.  The ratio of the amount of money she spent on the apples to the amount she spent on the pears was 3:2. The ratio of the amount of money she spent on the pears to the amount of money she spent on the mangoes was 1:5. The cost of each apple was $0.60.  Find the total number of fruits John bought. 
Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions