Ruby Basic sales tax problem


Q. Basic sales tax is applicable at a rate of 10% on all goods, except books, food, and medical products that are exempt.
Import duty is an additional sales tax applicable on all imported goods at a rate of 5%, with no exemptions.

When I purchase items I receive a receipt which lists the name of all the items and their price (including tax),
finishing with the total cost of the items, and the total amounts of sales taxes paid.

The rounding rules for sales tax are that for a tax rate of n%, a shelf price of p contains (np/100 rounded up to the
nearest 0.05) amount of sales tax.

Write an application that prints out the receipt details for these shopping baskets…

INPUT:

Input 1:
1 book at 12.49
1 music CD at 14.99
1 chocolate bar at 0.85

Input 2:
1 imported box of chocolates at 10.00
1 imported bottle of perfume at 47.50

Input 3:
1 imported bottle of perfume at 27.99
1 bottle of perfume at 18.99
1 packet of headache pills at 9.75
1 box of imported chocolates at 11.25

OUTPUT

Output 1:
1 book : 12.49
1 music CD: 16.49
1 chocolate bar: 0.85
Sales Taxes: 1.50
Total: 29.83

Output 2:
1 imported box of chocolates: 10.50
1 imported bottle of perfume: 54.65
Sales Taxes: 7.65
Total: 65.15

Output 3:
1 imported bottle of perfume: 32.19
1 bottle of perfume: 20.89
1 packet of headache pills: 9.75
1 imported box of chocolates: 11.85
Sales Taxes: 6.70
Total: 74.68

Code

class SalesTexes
 
  RECEIPT1 = [“1 imported box of chocolates at 10.00”, “1 imported bottle of perfume at 47.50”]
  RECEIPT2 = [ “1 book at 12.49”, “1 music CD at 14.99”, “1 chocolate bar at 0.85” ]
  RECEIPT3 = [ “1 imported bottle of perfume at 27.99”, “1 bottle of perfume at 18.99”, “1 packet of headache pills at 9.75”, “1 box of imported chocolates at 11.25”]
 
  TAX_EXCEPT_ITEM = [“chocolates”,”book”,”pills”,”chocolate”]
 
  IMPORT_TAX = 0.05
  SALES_TAX = 0.10
  BOTH_TAX = 0.15
  CENTS_ROUNDING_MULTIPLIER = 20.0
 
  def initialize
    puts “*************First receipt*****************”
    get_input RECEIPT1
    puts “*************Second receipt*****************”
    get_input RECEIPT2
    puts “*************Third receipt*****************”
    get_input RECEIPT3
  end
 
  def get_input input_array
    total_tax = 0
    total_price = 0
    input_array.each do |each_item|
       i_item = each_item.split
       qty = i_item[0].to_i
       price = i_item[-1].to_f
       p = each_item.split(” at “)
       product = p[0].delete(“/0-9/”).strip
       tax = tax_cal price,product
       total_tax += tax
       tax_price = (price.to_f + tax)
       total_price += tax_price
       p “#{qty} #{product}: #{tax_price.round(2)}”
    end
    p “Sales Tax: #{total_tax.round(2)}”
    p “Total: #{total_price.round(2)}”
  end
 
  def tax_cal price,product
    tax_exclude = []
    a_product = product.split(” “)
    tax_exclude = a_product & TAX_EXCEPT_ITEM
    if product.include?(‘imported’) and tax_exclude.count != 1
      tax = price.to_f * BOTH_TAX
    elsif product.include?(‘imported’) and tax_exclude.count == 1
      tax = price.to_f * IMPORT_TAX
    elsif tax_exclude.count != 1
      tax = price.to_f * SALES_TAX
    else
      tax = 0
    end
    return tax
  end
 
end

SalesTexes.new
 

 

 

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