Program to calculate prices from base price, VAT and transport costs

pricecalc.py

#!/usr/bin/env python
import sys

try:    
  price=int(sys.argv[1])
  tax={"A":21,"B":10,"C":4}[sys.argv[2]]
  transp=(price*int(sys.argv[3]))/100
  totvar=price+((price+transp)*tax/100)
  print "Base price: %i + %i%% VAT + %i%% transport = %i" %(price,tax,transp,totvar)
except: 
  print "Use: pricecalc.py [price] [VAT] [transport]"