There were some chikoos, pears and lemons. The number of chikoos was four times the number of pears. The total number of chikoos and pears was one-quarter of the number of lemons. There were 150 fruits altogether. All the lemons were sold at 4 for $13. How much money was collected from the sale of the lemons?
Number of pears = 1 u
Number of chikoos = 4 u

Total number of pears and chikoos
= 1 u + 4 u
= 5 u

Number of lemons
= 4 x 5 u
= 20 u

Total number of fruits
= 1 u + 4 u + 20 u
= 25 u

25 u = 150

1 u = 150 ÷ 25 = 6

Number of lemons sold
= 20 u
= 20 x 6
= 120

Number of sets of 4 lemons
= 120 ÷ 4
= 30

Amount collected from the sale of lemons
= 30 x 13
= $390

Answer(s): $390