Mr. Roberts will make a total payment of $30 x 12 = $<<30*12=360>>360 for 12 months.

Thus, the television costs $360 + $120 = $<<360+120=480>>480 when not paid in cash.

Therefore, Mr. Roberts can save $480 - $400 = $<<480-400=80>>80 by paying cash.

# Answer

80
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mr. Roberts can buy a television for $400 cash or $120 down payment and $30 a month for 12 months. How much can he save by paying cash?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
80
Mr. Roberts can buy a television for $400 cash or $120 down payment and $30 a month for 12 months. How much can he save by paying cash?
train