I invested in mutual funds through systematic investment plans (SIPs) in April 2018, The funds are: HDFC Top 100 Fund (Rs 2,000), Reliance Large Cap Fund (Rs 2,500), Kotak Multicap Fund (Rs 2,500), HDFC Mid-Cap Opportunities Fund (Rs 2,000) and Sundaram Mid Cap Fund (Rs 1,000). How much more do I need to invest every month to accumulate Rs 2 crore after 12 years?