Should I leave CA IPCC & prepare for CAT (not because I can't do it) as it has less part of finance or should I do MBA after CA?

Almost all coaching institutes in Delhi offer weekend batches. You can check the timings and join according to your requirement.

To choose the best CAT coaching institute for yourself in Delhi NCR, you must check the fee, location, online review and success rate.

The average fee ranges from INR 25,000 to INR 60,000 for CAT coaching in Delhi-NCR.

For cracking CAT Profit and Loss question, refer to Class 9 and 10 NCERT Math books for fundamentals. For advance level questions, refer books recommended for CAT quantitative aptitude preparation.  

CAT quantitative aptitude section has 22 question and maximum questions are asked from Arithmetic. About 2-4 questions are asked from Profit and Loss and if you crack them correctly, 6 to 8 marks are assured. This can make a huge difference in your overall Quant score.