The seller has offered him the TV for 1000 - 100 = $<<1000-100=900>>900.

The discount on the television was 900 * 20/100 = $<<900*20/100=180>>180.

The final price of the television is therefore 900 - 180 = $<<900-180=720>>720.

Martin was able to save 1000 - 720 = $<<1000-720=280>>280.

# Answer

280
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Martin went to a store to buy a new television set. He decided to spend no more than $1,000 and the sales clerk offered him the TV for $100 less and an additional 20% off. How much lower was the price of the television than the amount Martin decided to spend?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
280
Martin went to a store to buy a new television set. He decided to spend no more than $1,000 and the sales clerk offered him the TV for $100 less and an additional 20% off. How much lower was the price of the television than the amount Martin decided to spend?
train