Fast fingerG 10

The way I did this was I laid my phone on a non-slippery surface, with the top facing towards my stomach, I then got both my Index fingers and did a swiping motion drum roll on the screen. This was the easiest for me as I have problems with my arms and hands. Hope this helps

Fast finger G10:
Swipe 170 bills in 30 seconds

This is quite easy. Just swipe with the mouse as fast as you can.