adding functionality to script. Wondering why it repeats the gets.chomp and gives weird answer.

perdiem.rb

require 'date'


class PerDiem
 
	
	attr_accessor :start_date, :end_date,  

	def initalize(start_date, end_date, per_diem)
		@start_date = start_date
		@end_date = end_date
		@per_diem = per_diem
	end

	def get_dates
		puts "Insert dates. (dd/mm/yyyy)"
		puts "starting date..."
		@start_date = Date.parse(gets.chomp)
		puts "ending date..."
		@end_date = Date.parse(gets.chomp)
	end

	def number_of_days
		(@end_date - @start_date).to_i
	end
	
	def amount_of_per_diem
		puts "Per Diem Rate..."
		@per_diem = gets.chomp
		if number_of_days > 180
			@per_diem = @per_diem * 0.55
		elsif number_of_days < 30 && number_of_days < 90
			@per_diem = @per_diem * 0.75
		else
			@per_diem
		end
	end

	def display_number_of_days
		puts "-" * 40
		puts "Number of days: #{number_of_days}"

	end

	def calculate_per_diem
		@per_diem * number_of_days
	end

	def display_per_diem
		puts "-" * 40
		puts "Amount of Per Diem Earned: #{calculate_per_diem}"
	end

end


darin = PerDiem.new
darin.get_dates
darin.number_of_days
darin.display_number_of_days
darin.amount_of_per_diem
darin.calculate_per_diem
puts "Per Diem rate: " + darin.amount_of_per_diem.to_s
darin.display_per_diem