Will this work for charge and sync¿?

Basically my usage will be a Little bit different that bitcoint miner, we need to use as a charging and sync station.

I know the total AMP for both of them

10 port [10amp] =

•   5 devices of 1.0a  (Charge & Sync)
•   2 tablets of 2.1a   (Charge & Sync)
•   Total load 9.2amp

¿Am I right?

19 port [20amp] =

•   9 devices of 1.0a  (Charge & Sync)
•   5 tablets of 2.1a  (Charge & Sync)
•   Total load 19.5amp

¿Am I right?

49 port [75amp] =

•   38 devices of 1.0a  (Charge & Sync)
•   15 tablets of 2.1a  (Charge & Sync)
•   total load 70.5amp

¿Am I right?



In resume, is the AMP measure by usb port or by total load?. Could I buy a 100amp 5v PSU for the 49 USB port? In order to supply 2.1a to all of the ports