The sales tax is worth $100 x 4/100 = $<<100*4/100=4>>4.
Greg left $100 x 6/100 = $<<100*6/100=6>>6 tip.
So, the total cost for the tax and the tip is $4 + $6 = $<<4+6=10>>10
Therefore, Greg paid $100 + $10 = $<<100+10=110>>110 in all.
#### 110