How to determine Current draw from datasheet (shift register)

I'd go with this #:

"Low Power Consumption: 80-?A (Max) ICC"
Icc from the bottom of page 6.

"All unused inputs of the device must be held at VCC or GND to ensure proper device operation. See the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004."