sign_shop.rb

def area_price(length,width)
  length * width * 15
end

def colour_price(colour_count)
  colour_count <= 2 ? 10 * colour_count : 15 * colour_count
end

def add_tax(price_without_tax)
  (price_without_tax * 1.15).round(2)
end

def price(length, width, colour_count)
  price = area_price(length,width) + colour_price(colour_count)
  final_price = add_tax(price)
  puts "For a banner sign that is #{length} feet long, #{width} feet wide, and has #{colour_count} colors, the price is: #{final_price}"
end

price(2,3,5)
price(2,2,1)
price(1,1,1)
price(6,5,10)
price(6,5,1)