$$7-7 + 16-6 + 34-4 + 45-15 +50$$  $$= 0+10+30+30+50$$  $$= 120$$ 
Calculate the value of $$7 + 16 + 34 + 45 + 50 - 6 - 15 - 4 - 7$$. 
Options:
  - $$70$$ 
  - $$120$$ 
  - $$127$$ 
  - $$124$$ 
  - None of the above 