signshop.rb

def square_foot_cost(length, width)
	sq_ft = length * width
	sq_ft_rate = 15
	sq_ft_rate * sq_ft
end

def colour_cost(num_colours) #you can customize the rates here for colours
	colour_rate = 10
	additional_colour_rate = 15
	if num_colours <= 2
		colour_rate * num_colours
	else
		colour_rate*2 + (num_colours-2)*additional_colour_rate
	end
end

def total(length, width, num_colours)
	tax_rate = 15 # change the tax rate here
	(square_foot_cost(length, width) + colour_cost(num_colours))*(tax_rate/100.00+1)
end

def signshop
	puts "="*40 + "\n"
	puts "Welcome to the sign shop!"
	puts "We charge $15/sq.ft."
	puts "=< 2 colours is $10/colour, $15 for each additional colour"
	puts "We add 15% GST\n\n"
	puts "Length?"
	input = gets.chomp
	length = Float(input)
	puts "Width?"
	input = gets.chomp
	width = Float(input)
	puts "How many colours?"
	input = gets.chomp
	num_colours = Integer(input)

	puts "="*40

	total = (total(length, width, num_colours)).round(2)
	total = total.to_s #this if statement ensures that the total always has two decimal places
	if /\d+\.\d$/.match(total)
		total = total + "0"
	end
	puts "Your total is $#{total}" 
end

signshop