Estimate the Power Supply Amount

I have 100 computers to be used by different groups of people including, secretaries and Engineers. I therefore would like to make an estimate of the amount of power supply to an office building which will house all these computers. The composition of these computers that are owned by my client is in two types with nameplate rating on the CPUs of: A) 110V/6A; B) 100-127V/8A. 120V will be the nominal supply.
