There were some starfruits, mangoes and mangosteens. The number of starfruits was five times the number of mangoes. The total number of starfruits and mangoes was half of the number of mangosteens. There were 180 fruits altogether. All the mangosteens were sold at 8 for $14. How much money was collected from the sale of the mangosteens?
Number of mangoes = 1 u
Number of starfruits = 5 u

Total number of mangoes and starfruits
= 1 u + 5 u
= 6 u

Number of mangosteens
= 2 x 6 u
= 12 u

Total number of fruits
= 1 u + 5 u + 12 u
= 18 u

18 u = 180

1 u = 180 ÷ 18 = 10

Number of mangosteens sold
= 12 u
= 12 x 10
= 120

Number of sets of 8 mangosteens
= 120 ÷ 8
= 15

Amount collected from the sale of mangosteens
= 15 x 14
= $210

Answer(s): $210