I need help with understanding the calculatin breakdown for the problem below - Pete needs $8000 in student loans to finish out the year. He is comparing two different loans. The current interest rate...

I need help with understanding the calculatin breakdown for the problem below -

Pete needs $8000 in student loans to finish out the year. He is comparing two different loans. The current interest rate is 6%  for a 5 year loan 4% for a 10 year loan.

Loan A
(5 years) results in monthly payments of $154.66 and a total payback value of $9,279.60.

Loan B
(10 years) results in monthly payments of $81.00 and a total payback value of $9,720.

Which loan requires more interest to be paid and by how much?