His first TV was 384 square inches because 24 x 16 = <<24*16=384>>384

His first TV cost $1.75 per square inch because 672 / 384 = <<672/384=1.75>>1.75

His new TV is 1,536 square inches.

It costs $.5 per square inch because 1152/ 1,536 = .5

His old TV cost $1 more per square inch because 1.75 - .75 = <<1.75-.75=1>>1

# Answer

1
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
When Mark bought his first tv it was was 24 inches wide and 16 inches tall. It cost $672. His new tv is 48 inches wide and 32 inches tall and costs $1152. How much more expensive as measure by cost per square inch, was his first TV compared to his newest TV?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1
When Mark bought his first tv it was was 24 inches wide and 16 inches tall. It cost $672. His new tv is 48 inches wide and 32 inches tall and costs $1152. How much more expensive as measure by cost per square inch, was his first TV compared to his newest TV?
train