The mural is 6*3=<<6*3=18>>18 sq meters
So the paint cost 18*4=$<<18*4=72>>72
The artist works for 18/1.5=<<18/1.5=12>>12 hours
He charges 12*10=$<<12*10=120>>120
So the total cost is 120+72=$<<120+72=192>>192
#### 192