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Jul 25th, 2017
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  1. Fornecedor Material Qtde Valor_Total
  2. A A 1 100
  3. A B 2 150
  4. A E 5 26
  5. B B 6 76
  6. C A 5 126
  7. C C 1 58
  8. D D 10 108
  9. E E 9 99
  10. E A 7 30
  11. E E 8 80
  12. E E 1 54
  13. F G 1 0
  14.  
  15. dados$valor_medio <- round(dados$Valor_Total/dados$Qtde,2)
  16.  
  17. dados<-tapply(dados$valor_medio, dados$Material, mean, na.rm = TRUE)
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