coding_your_code.rb

def size_finder
  puts 'How long is your sign? '
  length = gets.chomp.to_f

  puts 'How wide is your sign? '
  width = gets.chomp.to_f

  @total_size = length*width
end

def colour_finder
  puts 'How many colours? '
  colours_answer = gets.chomp.to_i
  if colours_answer <= 2
    @colours_price = colour_answer * 10
  else @colours_price = colours_answer * 15
  end  
end 

def tax_finder
  tax = (@total_size + @colours_price)* 1.15
  puts "Your total is #{tax}"
end

size_finder
colour_finder
tax_finder