i need help btw this is not graded or a test

James
First rectangle
5m and 7m
Perimeter= 2(5)+2(7)=10+14=24m
Second rectangle
3m and 2 m
Perimeter=2(3)+2(2)=6+4=10m
He needs to buy 24+10=34 m
James brother
11m and 4 m
Perimeter= 2(11)+2(8)=38m
the difference is 38-34=4m