Total Power Requirement Calculation

I have provided a client with a proposal that includes 80 PowerEdge R430 Production Servers with 64GB RDIMM and 400 X2 GB SSD + PowerEdge Management Servers with 32GB RDIMM and 300 X 2 GB SSA, housed in 3 Dell Netshelter cabinets. 

These are used for IPTV with 24/7/365 continuous service. How do I compute the total power requirement for the above system?

Thanks!