-3+-4+0+5+10+14+19+19+16+10+5+-1=
Then divide by 12?
-3+-4+0+5+10+14+19+19+16+10+5+-1 is 90.
divide that by 12 and the answer is 7.5.
-3+-4+0+5+10+14+19+19+16+-1=75
75/12=6.25
