Half his monthly income is $100+$20 = $<<100+20=120>>120

His monthly income therefore is 2*$120 = $<<2*120=240>>240

# Answer

240
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
George donated half his monthly income to charity and spent $20 from the other half on groceries. If he now has $100 left, how much was his monthly income?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
240
George donated half his monthly income to charity and spent $20 from the other half on groceries. If he now has $100 left, how much was his monthly income?
train