Cisco, Inc., has a proposal from the Engineering Planning Division to invest Cisco retained earnings in the design, testing, and development of the next generation of smart grids useful in the Internet of Things $($IoT$)$ environment. The initial investment projection is $$4,300,000$ in year $0,$ $$2,100,000$ in year $3,$ and $$113,057$ in years $11$ and beyond. At i $=15\%$ per year, calculate the infinite$-$life equivalent annual cost in years $0$ through infinity of the proposal.