i believe that if he has changed condenser +compressor + cabin filter + pipes then material cost be be around 20 k easily.
Recently bought a brand new condenser for Corolla 2007 and it costed me 4500
brand new compressor could cost you from 10k to 15 k minimum
cabin air filter can cost you at least 500
then pipes can cost you minimum additional 1000
definitely he must be charged the system with new gas that could cost you easily 2000 to 2500
then above all the Labor cost of round about 1500 Rs to 2000 Rs