printprice.rb

BWPRICE = 0.045
COLPRICE = 0.12

unless ARGV[0] then
  puts "Usage: #{$0} [#bwpages] [#colpages] [#copies] [binding-price/copy]"
  exit 1
end

binding_price = ARGV[3].to_f

bwpages = ARGV[0].to_i
colpages = ARGV[1].to_i
copies = ARGV[2] || 1
copies = copies.to_i
price = ((bwpages * BWPRICE) + (colpages * COLPRICE) + binding_price) * copies
puts "Printing cost: %.2f\n\t(%d bw + %d color pages * #{copies} copies + binding price/copy of %.2f)" % [price, bwpages, colpages,  binding_price]