There were some mangoes, mangosteens and passion fruits. The number of mangoes was two times the number of mangosteens. The total number of mangoes and mangosteens was half of the number of passion fruits. There were 180 fruits altogether. All the passion fruits were sold at 5 for $6. How much money was collected from the sale of the passion fruits?
Number of mangosteens = 1 u
Number of mangoes = 2 u

Total number of mangosteens and mangoes
= 1 u + 2 u
= 3 u

Number of passion fruits
= 2 x 3 u
= 6 u

Total number of fruits
= 1 u + 2 u + 6 u
= 9 u

9 u = 180

1 u = 180 ÷ 9 = 20

Number of passion fruits sold
= 6 u
= 6 x 20
= 120

Number of sets of 5 passion fruits
= 120 ÷ 5
= 24

Amount collected from the sale of passion fruits
= 24 x 6
= $144

Answer(s): $144